diff --git a/services/git/src/stackit/git/__init__.py b/services/git/src/stackit/git/__init__.py
index 47f69996..8f166806 100644
--- a/services/git/src/stackit/git/__init__.py
+++ b/services/git/src/stackit/git/__init__.py
@@ -5,9 +5,9 @@
 """
     STACKIT Git API
 
-    Manage STACKIT Git instances.
+    STACKIT Git management API.
 
-    The version of the OpenAPI document: 1beta.0.3
+    The version of the OpenAPI document: 1beta.0.4
     Contact: git@stackit.cloud
     Generated by OpenAPI Generator (https://openapi-generator.tech)
 
@@ -35,9 +35,12 @@
 
 # import models into sdk package
 from stackit.git.models.create_instance_payload import CreateInstancePayload
+from stackit.git.models.flavor import Flavor
+from stackit.git.models.generic_error_response import GenericErrorResponse
 from stackit.git.models.instance import Instance
 from stackit.git.models.internal_server_error_response import (
     InternalServerErrorResponse,
 )
+from stackit.git.models.list_flavors import ListFlavors
 from stackit.git.models.list_instances import ListInstances
 from stackit.git.models.unauthorized_response import UnauthorizedResponse
diff --git a/services/git/src/stackit/git/api/default_api.py b/services/git/src/stackit/git/api/default_api.py
index bec029b1..80fdffec 100644
--- a/services/git/src/stackit/git/api/default_api.py
+++ b/services/git/src/stackit/git/api/default_api.py
@@ -3,9 +3,9 @@
 """
     STACKIT Git API
 
-    Manage STACKIT Git instances.
+    STACKIT Git management API.
 
-    The version of the OpenAPI document: 1beta.0.3
+    The version of the OpenAPI document: 1beta.0.4
     Contact: git@stackit.cloud
     Generated by OpenAPI Generator (https://openapi-generator.tech)
 
@@ -14,7 +14,13 @@
 
 from typing import Any, Dict, List, Optional, Tuple, Union
 
-from pydantic import Field, StrictFloat, StrictInt, StrictStr, validate_call
+from pydantic import (
+    Field,
+    StrictFloat,
+    StrictInt,
+    StrictStr,
+    validate_call,
+)
 from stackit.core.configuration import Configuration
 from typing_extensions import Annotated
 
@@ -22,6 +28,7 @@
 from stackit.git.api_response import ApiResponse
 from stackit.git.models.create_instance_payload import CreateInstancePayload
 from stackit.git.models.instance import Instance
+from stackit.git.models.list_flavors import ListFlavors
 from stackit.git.models.list_instances import ListInstances
 from stackit.git.rest import RESTResponseType
 
@@ -42,17 +49,8 @@ def __init__(self, configuration: Configuration = None) -> None:
     @validate_call
     def create_instance(
         self,
-        project_id: Annotated[
-            str,
-            Field(
-                strict=True,
-                max_length=36,
-                description="The STACKIT portal project UUID the STACKIT Git instance is part of.",
-            ),
-        ],
-        create_instance_payload: Annotated[
-            CreateInstancePayload, Field(description="Provides the options to use when creating the instance.")
-        ],
+        project_id: Annotated[str, Field(min_length=36, strict=True, max_length=36, description="Project identifier.")],
+        create_instance_payload: Annotated[CreateInstancePayload, Field(description="Instance configuration options.")],
         _request_timeout: Union[
             None,
             Annotated[StrictFloat, Field(gt=0)],
@@ -63,13 +61,13 @@ def create_instance(
         _headers: Optional[Dict[StrictStr, Any]] = None,
         _host_index: Annotated[StrictInt, Field(ge=0, le=0)] = 0,
     ) -> Instance:
-        """Creates a new STACKIT Git instance within the project.
+        """Create an Instance.
 
-        Users with write-access to a project may create a new STACKIT Git instance by posting the instance creation request to this endpoint, which will schedule the creation of a new STACKIT Git instance within that project.
+        Creates a new STACKIT Git instance as a project resource.
 
-        :param project_id: The STACKIT portal project UUID the STACKIT Git instance is part of. (required)
+        :param project_id: Project identifier. (required)
         :type project_id: str
-        :param create_instance_payload: Provides the options to use when creating the instance. (required)
+        :param create_instance_payload: Instance configuration options. (required)
         :type create_instance_payload: CreateInstancePayload
         :param _request_timeout: timeout setting for this request. If one
                                  number provided, it will be total request
@@ -104,10 +102,10 @@ def create_instance(
 
         _response_types_map: Dict[str, Optional[str]] = {
             "201": "Instance",
-            "400": None,
+            "400": "GenericErrorResponse",
             "401": "UnauthorizedResponse",
-            "409": None,
-            "500": "InternalServerErrorResponse",
+            "409": "GenericErrorResponse",
+            "500": "GenericErrorResponse",
         }
         response_data = self.api_client.call_api(*_param, _request_timeout=_request_timeout)
         response_data.read()
@@ -119,17 +117,8 @@ def create_instance(
     @validate_call
     def create_instance_with_http_info(
         self,
-        project_id: Annotated[
-            str,
-            Field(
-                strict=True,
-                max_length=36,
-                description="The STACKIT portal project UUID the STACKIT Git instance is part of.",
-            ),
-        ],
-        create_instance_payload: Annotated[
-            CreateInstancePayload, Field(description="Provides the options to use when creating the instance.")
-        ],
+        project_id: Annotated[str, Field(min_length=36, strict=True, max_length=36, description="Project identifier.")],
+        create_instance_payload: Annotated[CreateInstancePayload, Field(description="Instance configuration options.")],
         _request_timeout: Union[
             None,
             Annotated[StrictFloat, Field(gt=0)],
@@ -140,13 +129,13 @@ def create_instance_with_http_info(
         _headers: Optional[Dict[StrictStr, Any]] = None,
         _host_index: Annotated[StrictInt, Field(ge=0, le=0)] = 0,
     ) -> ApiResponse[Instance]:
-        """Creates a new STACKIT Git instance within the project.
+        """Create an Instance.
 
-        Users with write-access to a project may create a new STACKIT Git instance by posting the instance creation request to this endpoint, which will schedule the creation of a new STACKIT Git instance within that project.
+        Creates a new STACKIT Git instance as a project resource.
 
-        :param project_id: The STACKIT portal project UUID the STACKIT Git instance is part of. (required)
+        :param project_id: Project identifier. (required)
         :type project_id: str
-        :param create_instance_payload: Provides the options to use when creating the instance. (required)
+        :param create_instance_payload: Instance configuration options. (required)
         :type create_instance_payload: CreateInstancePayload
         :param _request_timeout: timeout setting for this request. If one
                                  number provided, it will be total request
@@ -181,10 +170,10 @@ def create_instance_with_http_info(
 
         _response_types_map: Dict[str, Optional[str]] = {
             "201": "Instance",
-            "400": None,
+            "400": "GenericErrorResponse",
             "401": "UnauthorizedResponse",
-            "409": None,
-            "500": "InternalServerErrorResponse",
+            "409": "GenericErrorResponse",
+            "500": "GenericErrorResponse",
         }
         response_data = self.api_client.call_api(*_param, _request_timeout=_request_timeout)
         response_data.read()
@@ -196,17 +185,8 @@ def create_instance_with_http_info(
     @validate_call
     def create_instance_without_preload_content(
         self,
-        project_id: Annotated[
-            str,
-            Field(
-                strict=True,
-                max_length=36,
-                description="The STACKIT portal project UUID the STACKIT Git instance is part of.",
-            ),
-        ],
-        create_instance_payload: Annotated[
-            CreateInstancePayload, Field(description="Provides the options to use when creating the instance.")
-        ],
+        project_id: Annotated[str, Field(min_length=36, strict=True, max_length=36, description="Project identifier.")],
+        create_instance_payload: Annotated[CreateInstancePayload, Field(description="Instance configuration options.")],
         _request_timeout: Union[
             None,
             Annotated[StrictFloat, Field(gt=0)],
@@ -217,13 +197,13 @@ def create_instance_without_preload_content(
         _headers: Optional[Dict[StrictStr, Any]] = None,
         _host_index: Annotated[StrictInt, Field(ge=0, le=0)] = 0,
     ) -> RESTResponseType:
-        """Creates a new STACKIT Git instance within the project.
+        """Create an Instance.
 
-        Users with write-access to a project may create a new STACKIT Git instance by posting the instance creation request to this endpoint, which will schedule the creation of a new STACKIT Git instance within that project.
+        Creates a new STACKIT Git instance as a project resource.
 
-        :param project_id: The STACKIT portal project UUID the STACKIT Git instance is part of. (required)
+        :param project_id: Project identifier. (required)
         :type project_id: str
-        :param create_instance_payload: Provides the options to use when creating the instance. (required)
+        :param create_instance_payload: Instance configuration options. (required)
         :type create_instance_payload: CreateInstancePayload
         :param _request_timeout: timeout setting for this request. If one
                                  number provided, it will be total request
@@ -258,10 +238,10 @@ def create_instance_without_preload_content(
 
         _response_types_map: Dict[str, Optional[str]] = {
             "201": "Instance",
-            "400": None,
+            "400": "GenericErrorResponse",
             "401": "UnauthorizedResponse",
-            "409": None,
-            "500": "InternalServerErrorResponse",
+            "409": "GenericErrorResponse",
+            "500": "GenericErrorResponse",
         }
         response_data = self.api_client.call_api(*_param, _request_timeout=_request_timeout)
         return response_data.response
@@ -330,15 +310,10 @@ def _create_instance_serialize(
     @validate_call
     def delete_instance(
         self,
-        project_id: Annotated[
-            str,
-            Field(
-                strict=True,
-                max_length=36,
-                description="The STACKIT portal project UUID the STACKIT Git instance is part of.",
-            ),
+        project_id: Annotated[str, Field(min_length=36, strict=True, max_length=36, description="Project identifier.")],
+        instance_id: Annotated[
+            str, Field(min_length=36, strict=True, max_length=36, description="Instance identifier.")
         ],
-        instance_id: Annotated[str, Field(strict=True, max_length=36, description="The STACKIT Git instance UUID.")],
         _request_timeout: Union[
             None,
             Annotated[StrictFloat, Field(gt=0)],
@@ -349,13 +324,13 @@ def delete_instance(
         _headers: Optional[Dict[StrictStr, Any]] = None,
         _host_index: Annotated[StrictInt, Field(ge=0, le=0)] = 0,
     ) -> None:
-        """Deletes the given STACKIT Git instance.
+        """Delete Instance.
 
-        Allows a user with write-access to a project to schedule the deletion of a STACKIT Git instance, which will soon eliminate all repositories & user metadata associated with that instance. This is a destructive operation.
+        Deletes a STACKIT Git instance and destroys all associated data.
 
-        :param project_id: The STACKIT portal project UUID the STACKIT Git instance is part of. (required)
+        :param project_id: Project identifier. (required)
         :type project_id: str
-        :param instance_id: The STACKIT Git instance UUID. (required)
+        :param instance_id: Instance identifier. (required)
         :type instance_id: str
         :param _request_timeout: timeout setting for this request. If one
                                  number provided, it will be total request
@@ -390,11 +365,11 @@ def delete_instance(
 
         _response_types_map: Dict[str, Optional[str]] = {
             "202": None,
-            "400": None,
+            "400": "GenericErrorResponse",
             "401": "UnauthorizedResponse",
             "404": None,
             "409": None,
-            "500": "InternalServerErrorResponse",
+            "500": "GenericErrorResponse",
         }
         response_data = self.api_client.call_api(*_param, _request_timeout=_request_timeout)
         response_data.read()
@@ -406,15 +381,10 @@ def delete_instance(
     @validate_call
     def delete_instance_with_http_info(
         self,
-        project_id: Annotated[
-            str,
-            Field(
-                strict=True,
-                max_length=36,
-                description="The STACKIT portal project UUID the STACKIT Git instance is part of.",
-            ),
+        project_id: Annotated[str, Field(min_length=36, strict=True, max_length=36, description="Project identifier.")],
+        instance_id: Annotated[
+            str, Field(min_length=36, strict=True, max_length=36, description="Instance identifier.")
         ],
-        instance_id: Annotated[str, Field(strict=True, max_length=36, description="The STACKIT Git instance UUID.")],
         _request_timeout: Union[
             None,
             Annotated[StrictFloat, Field(gt=0)],
@@ -425,13 +395,13 @@ def delete_instance_with_http_info(
         _headers: Optional[Dict[StrictStr, Any]] = None,
         _host_index: Annotated[StrictInt, Field(ge=0, le=0)] = 0,
     ) -> ApiResponse[None]:
-        """Deletes the given STACKIT Git instance.
+        """Delete Instance.
 
-        Allows a user with write-access to a project to schedule the deletion of a STACKIT Git instance, which will soon eliminate all repositories & user metadata associated with that instance. This is a destructive operation.
+        Deletes a STACKIT Git instance and destroys all associated data.
 
-        :param project_id: The STACKIT portal project UUID the STACKIT Git instance is part of. (required)
+        :param project_id: Project identifier. (required)
         :type project_id: str
-        :param instance_id: The STACKIT Git instance UUID. (required)
+        :param instance_id: Instance identifier. (required)
         :type instance_id: str
         :param _request_timeout: timeout setting for this request. If one
                                  number provided, it will be total request
@@ -466,11 +436,11 @@ def delete_instance_with_http_info(
 
         _response_types_map: Dict[str, Optional[str]] = {
             "202": None,
-            "400": None,
+            "400": "GenericErrorResponse",
             "401": "UnauthorizedResponse",
             "404": None,
             "409": None,
-            "500": "InternalServerErrorResponse",
+            "500": "GenericErrorResponse",
         }
         response_data = self.api_client.call_api(*_param, _request_timeout=_request_timeout)
         response_data.read()
@@ -482,15 +452,10 @@ def delete_instance_with_http_info(
     @validate_call
     def delete_instance_without_preload_content(
         self,
-        project_id: Annotated[
-            str,
-            Field(
-                strict=True,
-                max_length=36,
-                description="The STACKIT portal project UUID the STACKIT Git instance is part of.",
-            ),
+        project_id: Annotated[str, Field(min_length=36, strict=True, max_length=36, description="Project identifier.")],
+        instance_id: Annotated[
+            str, Field(min_length=36, strict=True, max_length=36, description="Instance identifier.")
         ],
-        instance_id: Annotated[str, Field(strict=True, max_length=36, description="The STACKIT Git instance UUID.")],
         _request_timeout: Union[
             None,
             Annotated[StrictFloat, Field(gt=0)],
@@ -501,13 +466,13 @@ def delete_instance_without_preload_content(
         _headers: Optional[Dict[StrictStr, Any]] = None,
         _host_index: Annotated[StrictInt, Field(ge=0, le=0)] = 0,
     ) -> RESTResponseType:
-        """Deletes the given STACKIT Git instance.
+        """Delete Instance.
 
-        Allows a user with write-access to a project to schedule the deletion of a STACKIT Git instance, which will soon eliminate all repositories & user metadata associated with that instance. This is a destructive operation.
+        Deletes a STACKIT Git instance and destroys all associated data.
 
-        :param project_id: The STACKIT portal project UUID the STACKIT Git instance is part of. (required)
+        :param project_id: Project identifier. (required)
         :type project_id: str
-        :param instance_id: The STACKIT Git instance UUID. (required)
+        :param instance_id: Instance identifier. (required)
         :type instance_id: str
         :param _request_timeout: timeout setting for this request. If one
                                  number provided, it will be total request
@@ -542,11 +507,11 @@ def delete_instance_without_preload_content(
 
         _response_types_map: Dict[str, Optional[str]] = {
             "202": None,
-            "400": None,
+            "400": "GenericErrorResponse",
             "401": "UnauthorizedResponse",
             "404": None,
             "409": None,
-            "500": "InternalServerErrorResponse",
+            "500": "GenericErrorResponse",
         }
         response_data = self.api_client.call_api(*_param, _request_timeout=_request_timeout)
         return response_data.response
@@ -607,15 +572,10 @@ def _delete_instance_serialize(
     @validate_call
     def get_instance(
         self,
-        project_id: Annotated[
-            str,
-            Field(
-                strict=True,
-                max_length=36,
-                description="The STACKIT portal project UUID the STACKIT Git instance is part of.",
-            ),
+        project_id: Annotated[str, Field(min_length=36, strict=True, max_length=36, description="Project identifier.")],
+        instance_id: Annotated[
+            str, Field(min_length=36, strict=True, max_length=36, description="Instance identifier.")
         ],
-        instance_id: Annotated[str, Field(strict=True, max_length=36, description="The STACKIT Git instance UUID.")],
         _request_timeout: Union[
             None,
             Annotated[StrictFloat, Field(gt=0)],
@@ -626,13 +586,13 @@ def get_instance(
         _headers: Optional[Dict[StrictStr, Any]] = None,
         _host_index: Annotated[StrictInt, Field(ge=0, le=0)] = 0,
     ) -> Instance:
-        """Returns the details for the given STACKIT Git instance.
+        """Get Instance information.
 
-        Provides detailed information about the state of an instance within the specified project including information about how to access the instance for further use.
+        Retrieves information about a STACKIT Git instance.
 
-        :param project_id: The STACKIT portal project UUID the STACKIT Git instance is part of. (required)
+        :param project_id: Project identifier. (required)
         :type project_id: str
-        :param instance_id: The STACKIT Git instance UUID. (required)
+        :param instance_id: Instance identifier. (required)
         :type instance_id: str
         :param _request_timeout: timeout setting for this request. If one
                                  number provided, it will be total request
@@ -667,10 +627,10 @@ def get_instance(
 
         _response_types_map: Dict[str, Optional[str]] = {
             "200": "Instance",
-            "400": None,
+            "400": "GenericErrorResponse",
             "401": "UnauthorizedResponse",
             "404": None,
-            "500": "InternalServerErrorResponse",
+            "500": "GenericErrorResponse",
         }
         response_data = self.api_client.call_api(*_param, _request_timeout=_request_timeout)
         response_data.read()
@@ -682,15 +642,10 @@ def get_instance(
     @validate_call
     def get_instance_with_http_info(
         self,
-        project_id: Annotated[
-            str,
-            Field(
-                strict=True,
-                max_length=36,
-                description="The STACKIT portal project UUID the STACKIT Git instance is part of.",
-            ),
+        project_id: Annotated[str, Field(min_length=36, strict=True, max_length=36, description="Project identifier.")],
+        instance_id: Annotated[
+            str, Field(min_length=36, strict=True, max_length=36, description="Instance identifier.")
         ],
-        instance_id: Annotated[str, Field(strict=True, max_length=36, description="The STACKIT Git instance UUID.")],
         _request_timeout: Union[
             None,
             Annotated[StrictFloat, Field(gt=0)],
@@ -701,13 +656,13 @@ def get_instance_with_http_info(
         _headers: Optional[Dict[StrictStr, Any]] = None,
         _host_index: Annotated[StrictInt, Field(ge=0, le=0)] = 0,
     ) -> ApiResponse[Instance]:
-        """Returns the details for the given STACKIT Git instance.
+        """Get Instance information.
 
-        Provides detailed information about the state of an instance within the specified project including information about how to access the instance for further use.
+        Retrieves information about a STACKIT Git instance.
 
-        :param project_id: The STACKIT portal project UUID the STACKIT Git instance is part of. (required)
+        :param project_id: Project identifier. (required)
         :type project_id: str
-        :param instance_id: The STACKIT Git instance UUID. (required)
+        :param instance_id: Instance identifier. (required)
         :type instance_id: str
         :param _request_timeout: timeout setting for this request. If one
                                  number provided, it will be total request
@@ -742,10 +697,10 @@ def get_instance_with_http_info(
 
         _response_types_map: Dict[str, Optional[str]] = {
             "200": "Instance",
-            "400": None,
+            "400": "GenericErrorResponse",
             "401": "UnauthorizedResponse",
             "404": None,
-            "500": "InternalServerErrorResponse",
+            "500": "GenericErrorResponse",
         }
         response_data = self.api_client.call_api(*_param, _request_timeout=_request_timeout)
         response_data.read()
@@ -757,15 +712,10 @@ def get_instance_with_http_info(
     @validate_call
     def get_instance_without_preload_content(
         self,
-        project_id: Annotated[
-            str,
-            Field(
-                strict=True,
-                max_length=36,
-                description="The STACKIT portal project UUID the STACKIT Git instance is part of.",
-            ),
+        project_id: Annotated[str, Field(min_length=36, strict=True, max_length=36, description="Project identifier.")],
+        instance_id: Annotated[
+            str, Field(min_length=36, strict=True, max_length=36, description="Instance identifier.")
         ],
-        instance_id: Annotated[str, Field(strict=True, max_length=36, description="The STACKIT Git instance UUID.")],
         _request_timeout: Union[
             None,
             Annotated[StrictFloat, Field(gt=0)],
@@ -776,13 +726,13 @@ def get_instance_without_preload_content(
         _headers: Optional[Dict[StrictStr, Any]] = None,
         _host_index: Annotated[StrictInt, Field(ge=0, le=0)] = 0,
     ) -> RESTResponseType:
-        """Returns the details for the given STACKIT Git instance.
+        """Get Instance information.
 
-        Provides detailed information about the state of an instance within the specified project including information about how to access the instance for further use.
+        Retrieves information about a STACKIT Git instance.
 
-        :param project_id: The STACKIT portal project UUID the STACKIT Git instance is part of. (required)
+        :param project_id: Project identifier. (required)
         :type project_id: str
-        :param instance_id: The STACKIT Git instance UUID. (required)
+        :param instance_id: Instance identifier. (required)
         :type instance_id: str
         :param _request_timeout: timeout setting for this request. If one
                                  number provided, it will be total request
@@ -817,10 +767,10 @@ def get_instance_without_preload_content(
 
         _response_types_map: Dict[str, Optional[str]] = {
             "200": "Instance",
-            "400": None,
+            "400": "GenericErrorResponse",
             "401": "UnauthorizedResponse",
             "404": None,
-            "500": "InternalServerErrorResponse",
+            "500": "GenericErrorResponse",
         }
         response_data = self.api_client.call_api(*_param, _request_timeout=_request_timeout)
         return response_data.response
@@ -879,7 +829,7 @@ def _get_instance_serialize(
         )
 
     @validate_call
-    def list_instances(
+    def list_flavors(
         self,
         project_id: Annotated[
             str,
@@ -898,10 +848,10 @@ def list_instances(
         _content_type: Optional[StrictStr] = None,
         _headers: Optional[Dict[StrictStr, Any]] = None,
         _host_index: Annotated[StrictInt, Field(ge=0, le=0)] = 0,
-    ) -> ListInstances:
-        """Returns a list of all STACKIT Git instances within the project.
+    ) -> ListFlavors:
+        """Returns the details for the given STACKIT Git flavors.
 
-        STACKIT Git instances exist within a project, and a project may have zero or more instances. This endpoint allows a user with read-access to a project to list all instances that exist within the specified project.
+        Provides detailed information about possible Git Flavors.
 
         :param project_id: The STACKIT portal project UUID the STACKIT Git instance is part of. (required)
         :type project_id: str
@@ -927,7 +877,7 @@ def list_instances(
         :return: Returns the result object.
         """  # noqa: E501 docstring might be too long
 
-        _param = self._list_instances_serialize(
+        _param = self._list_flavors_serialize(
             project_id=project_id,
             _request_auth=_request_auth,
             _content_type=_content_type,
@@ -936,9 +886,10 @@ def list_instances(
         )
 
         _response_types_map: Dict[str, Optional[str]] = {
-            "200": "ListInstances",
+            "200": "ListFlavors",
             "400": None,
             "401": "UnauthorizedResponse",
+            "404": None,
             "500": "InternalServerErrorResponse",
         }
         response_data = self.api_client.call_api(*_param, _request_timeout=_request_timeout)
@@ -949,7 +900,7 @@ def list_instances(
         ).data
 
     @validate_call
-    def list_instances_with_http_info(
+    def list_flavors_with_http_info(
         self,
         project_id: Annotated[
             str,
@@ -968,10 +919,10 @@ def list_instances_with_http_info(
         _content_type: Optional[StrictStr] = None,
         _headers: Optional[Dict[StrictStr, Any]] = None,
         _host_index: Annotated[StrictInt, Field(ge=0, le=0)] = 0,
-    ) -> ApiResponse[ListInstances]:
-        """Returns a list of all STACKIT Git instances within the project.
+    ) -> ApiResponse[ListFlavors]:
+        """Returns the details for the given STACKIT Git flavors.
 
-        STACKIT Git instances exist within a project, and a project may have zero or more instances. This endpoint allows a user with read-access to a project to list all instances that exist within the specified project.
+        Provides detailed information about possible Git Flavors.
 
         :param project_id: The STACKIT portal project UUID the STACKIT Git instance is part of. (required)
         :type project_id: str
@@ -997,7 +948,7 @@ def list_instances_with_http_info(
         :return: Returns the result object.
         """  # noqa: E501 docstring might be too long
 
-        _param = self._list_instances_serialize(
+        _param = self._list_flavors_serialize(
             project_id=project_id,
             _request_auth=_request_auth,
             _content_type=_content_type,
@@ -1006,9 +957,10 @@ def list_instances_with_http_info(
         )
 
         _response_types_map: Dict[str, Optional[str]] = {
-            "200": "ListInstances",
+            "200": "ListFlavors",
             "400": None,
             "401": "UnauthorizedResponse",
+            "404": None,
             "500": "InternalServerErrorResponse",
         }
         response_data = self.api_client.call_api(*_param, _request_timeout=_request_timeout)
@@ -1019,7 +971,7 @@ def list_instances_with_http_info(
         )
 
     @validate_call
-    def list_instances_without_preload_content(
+    def list_flavors_without_preload_content(
         self,
         project_id: Annotated[
             str,
@@ -1039,9 +991,9 @@ def list_instances_without_preload_content(
         _headers: Optional[Dict[StrictStr, Any]] = None,
         _host_index: Annotated[StrictInt, Field(ge=0, le=0)] = 0,
     ) -> RESTResponseType:
-        """Returns a list of all STACKIT Git instances within the project.
+        """Returns the details for the given STACKIT Git flavors.
 
-        STACKIT Git instances exist within a project, and a project may have zero or more instances. This endpoint allows a user with read-access to a project to list all instances that exist within the specified project.
+        Provides detailed information about possible Git Flavors.
 
         :param project_id: The STACKIT portal project UUID the STACKIT Git instance is part of. (required)
         :type project_id: str
@@ -1067,7 +1019,7 @@ def list_instances_without_preload_content(
         :return: Returns the result object.
         """  # noqa: E501 docstring might be too long
 
-        _param = self._list_instances_serialize(
+        _param = self._list_flavors_serialize(
             project_id=project_id,
             _request_auth=_request_auth,
             _content_type=_content_type,
@@ -1076,14 +1028,250 @@ def list_instances_without_preload_content(
         )
 
         _response_types_map: Dict[str, Optional[str]] = {
-            "200": "ListInstances",
+            "200": "ListFlavors",
             "400": None,
             "401": "UnauthorizedResponse",
+            "404": None,
             "500": "InternalServerErrorResponse",
         }
         response_data = self.api_client.call_api(*_param, _request_timeout=_request_timeout)
         return response_data.response
 
+    def _list_flavors_serialize(
+        self,
+        project_id,
+        _request_auth,
+        _content_type,
+        _headers,
+        _host_index,
+    ) -> RequestSerialized:
+
+        _host = None
+
+        _collection_formats: Dict[str, str] = {}
+
+        _path_params: Dict[str, str] = {}
+        _query_params: List[Tuple[str, str]] = []
+        _header_params: Dict[str, Optional[str]] = _headers or {}
+        _form_params: List[Tuple[str, str]] = []
+        _files: Dict[str, Union[str, bytes]] = {}
+        _body_params: Optional[bytes] = None
+
+        # process the path parameters
+        if project_id is not None:
+            _path_params["projectId"] = project_id
+        # process the query parameters
+        # process the header parameters
+        # process the form parameters
+        # process the body parameter
+
+        # set the HTTP header `Accept`
+        if "Accept" not in _header_params:
+            _header_params["Accept"] = self.api_client.select_header_accept(["application/json"])
+
+        # authentication setting
+        _auth_settings: List[str] = []
+
+        return self.api_client.param_serialize(
+            method="GET",
+            resource_path="/v1beta/projects/{projectId}/flavors",
+            path_params=_path_params,
+            query_params=_query_params,
+            header_params=_header_params,
+            body=_body_params,
+            post_params=_form_params,
+            files=_files,
+            auth_settings=_auth_settings,
+            collection_formats=_collection_formats,
+            _host=_host,
+            _request_auth=_request_auth,
+        )
+
+    @validate_call
+    def list_instances(
+        self,
+        project_id: Annotated[str, Field(min_length=36, strict=True, max_length=36, description="Project identifier.")],
+        _request_timeout: Union[
+            None,
+            Annotated[StrictFloat, Field(gt=0)],
+            Tuple[Annotated[StrictFloat, Field(gt=0)], Annotated[StrictFloat, Field(gt=0)]],
+        ] = None,
+        _request_auth: Optional[Dict[StrictStr, Any]] = None,
+        _content_type: Optional[StrictStr] = None,
+        _headers: Optional[Dict[StrictStr, Any]] = None,
+        _host_index: Annotated[StrictInt, Field(ge=0, le=0)] = 0,
+    ) -> ListInstances:
+        """List Instances.
+
+        Lists all STACKIT Git instances within a project.
+
+        :param project_id: Project identifier. (required)
+        :type project_id: str
+        :param _request_timeout: timeout setting for this request. If one
+                                 number provided, it will be total request
+                                 timeout. It can also be a pair (tuple) of
+                                 (connection, read) timeouts.
+        :type _request_timeout: int, tuple(int, int), optional
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the
+                              authentication in the spec for a single request.
+        :type _request_auth: dict, optional
+        :param _content_type: force content-type for the request.
+        :type _content_type: str, Optional
+        :param _headers: set to override the headers for a single
+                         request; this effectively ignores the headers
+                         in the spec for a single request.
+        :type _headers: dict, optional
+        :param _host_index: set to override the host_index for a single
+                            request; this effectively ignores the host_index
+                            in the spec for a single request.
+        :type _host_index: int, optional
+        :return: Returns the result object.
+        """  # noqa: E501 docstring might be too long
+
+        _param = self._list_instances_serialize(
+            project_id=project_id,
+            _request_auth=_request_auth,
+            _content_type=_content_type,
+            _headers=_headers,
+            _host_index=_host_index,
+        )
+
+        _response_types_map: Dict[str, Optional[str]] = {
+            "200": "ListInstances",
+            "400": "GenericErrorResponse",
+            "401": "UnauthorizedResponse",
+            "500": "GenericErrorResponse",
+        }
+        response_data = self.api_client.call_api(*_param, _request_timeout=_request_timeout)
+        response_data.read()
+        return self.api_client.response_deserialize(
+            response_data=response_data,
+            response_types_map=_response_types_map,
+        ).data
+
+    @validate_call
+    def list_instances_with_http_info(
+        self,
+        project_id: Annotated[str, Field(min_length=36, strict=True, max_length=36, description="Project identifier.")],
+        _request_timeout: Union[
+            None,
+            Annotated[StrictFloat, Field(gt=0)],
+            Tuple[Annotated[StrictFloat, Field(gt=0)], Annotated[StrictFloat, Field(gt=0)]],
+        ] = None,
+        _request_auth: Optional[Dict[StrictStr, Any]] = None,
+        _content_type: Optional[StrictStr] = None,
+        _headers: Optional[Dict[StrictStr, Any]] = None,
+        _host_index: Annotated[StrictInt, Field(ge=0, le=0)] = 0,
+    ) -> ApiResponse[ListInstances]:
+        """List Instances.
+
+        Lists all STACKIT Git instances within a project.
+
+        :param project_id: Project identifier. (required)
+        :type project_id: str
+        :param _request_timeout: timeout setting for this request. If one
+                                 number provided, it will be total request
+                                 timeout. It can also be a pair (tuple) of
+                                 (connection, read) timeouts.
+        :type _request_timeout: int, tuple(int, int), optional
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the
+                              authentication in the spec for a single request.
+        :type _request_auth: dict, optional
+        :param _content_type: force content-type for the request.
+        :type _content_type: str, Optional
+        :param _headers: set to override the headers for a single
+                         request; this effectively ignores the headers
+                         in the spec for a single request.
+        :type _headers: dict, optional
+        :param _host_index: set to override the host_index for a single
+                            request; this effectively ignores the host_index
+                            in the spec for a single request.
+        :type _host_index: int, optional
+        :return: Returns the result object.
+        """  # noqa: E501 docstring might be too long
+
+        _param = self._list_instances_serialize(
+            project_id=project_id,
+            _request_auth=_request_auth,
+            _content_type=_content_type,
+            _headers=_headers,
+            _host_index=_host_index,
+        )
+
+        _response_types_map: Dict[str, Optional[str]] = {
+            "200": "ListInstances",
+            "400": "GenericErrorResponse",
+            "401": "UnauthorizedResponse",
+            "500": "GenericErrorResponse",
+        }
+        response_data = self.api_client.call_api(*_param, _request_timeout=_request_timeout)
+        response_data.read()
+        return self.api_client.response_deserialize(
+            response_data=response_data,
+            response_types_map=_response_types_map,
+        )
+
+    @validate_call
+    def list_instances_without_preload_content(
+        self,
+        project_id: Annotated[str, Field(min_length=36, strict=True, max_length=36, description="Project identifier.")],
+        _request_timeout: Union[
+            None,
+            Annotated[StrictFloat, Field(gt=0)],
+            Tuple[Annotated[StrictFloat, Field(gt=0)], Annotated[StrictFloat, Field(gt=0)]],
+        ] = None,
+        _request_auth: Optional[Dict[StrictStr, Any]] = None,
+        _content_type: Optional[StrictStr] = None,
+        _headers: Optional[Dict[StrictStr, Any]] = None,
+        _host_index: Annotated[StrictInt, Field(ge=0, le=0)] = 0,
+    ) -> RESTResponseType:
+        """List Instances.
+
+        Lists all STACKIT Git instances within a project.
+
+        :param project_id: Project identifier. (required)
+        :type project_id: str
+        :param _request_timeout: timeout setting for this request. If one
+                                 number provided, it will be total request
+                                 timeout. It can also be a pair (tuple) of
+                                 (connection, read) timeouts.
+        :type _request_timeout: int, tuple(int, int), optional
+        :param _request_auth: set to override the auth_settings for an a single
+                              request; this effectively ignores the
+                              authentication in the spec for a single request.
+        :type _request_auth: dict, optional
+        :param _content_type: force content-type for the request.
+        :type _content_type: str, Optional
+        :param _headers: set to override the headers for a single
+                         request; this effectively ignores the headers
+                         in the spec for a single request.
+        :type _headers: dict, optional
+        :param _host_index: set to override the host_index for a single
+                            request; this effectively ignores the host_index
+                            in the spec for a single request.
+        :type _host_index: int, optional
+        :return: Returns the result object.
+        """  # noqa: E501 docstring might be too long
+
+        _param = self._list_instances_serialize(
+            project_id=project_id,
+            _request_auth=_request_auth,
+            _content_type=_content_type,
+            _headers=_headers,
+            _host_index=_host_index,
+        )
+
+        _response_types_map: Dict[str, Optional[str]] = {
+            "200": "ListInstances",
+            "400": "GenericErrorResponse",
+            "401": "UnauthorizedResponse",
+            "500": "GenericErrorResponse",
+        }
+        response_data = self.api_client.call_api(*_param, _request_timeout=_request_timeout)
+        return response_data.response
+
     def _list_instances_serialize(
         self,
         project_id,
diff --git a/services/git/src/stackit/git/api_client.py b/services/git/src/stackit/git/api_client.py
index 494553c2..59ef9b98 100644
--- a/services/git/src/stackit/git/api_client.py
+++ b/services/git/src/stackit/git/api_client.py
@@ -3,9 +3,9 @@
 """
     STACKIT Git API
 
-    Manage STACKIT Git instances.
+    STACKIT Git management API.
 
-    The version of the OpenAPI document: 1beta.0.3
+    The version of the OpenAPI document: 1beta.0.4
     Contact: git@stackit.cloud
     Generated by OpenAPI Generator (https://openapi-generator.tech)
 
diff --git a/services/git/src/stackit/git/configuration.py b/services/git/src/stackit/git/configuration.py
index 41a0a98c..a4b58c22 100644
--- a/services/git/src/stackit/git/configuration.py
+++ b/services/git/src/stackit/git/configuration.py
@@ -8,9 +8,9 @@
 """
     STACKIT Git API
 
-    Manage STACKIT Git instances.
+    STACKIT Git management API.
 
-    The version of the OpenAPI document: 1beta.0.3
+    The version of the OpenAPI document: 1beta.0.4
     Contact: git@stackit.cloud
     Generated by OpenAPI Generator (https://openapi-generator.tech)
 
diff --git a/services/git/src/stackit/git/exceptions.py b/services/git/src/stackit/git/exceptions.py
index eae1d129..38d6acf3 100644
--- a/services/git/src/stackit/git/exceptions.py
+++ b/services/git/src/stackit/git/exceptions.py
@@ -3,9 +3,9 @@
 """
     STACKIT Git API
 
-    Manage STACKIT Git instances.
+    STACKIT Git management API.
 
-    The version of the OpenAPI document: 1beta.0.3
+    The version of the OpenAPI document: 1beta.0.4
     Contact: git@stackit.cloud
     Generated by OpenAPI Generator (https://openapi-generator.tech)
 
diff --git a/services/git/src/stackit/git/models/__init__.py b/services/git/src/stackit/git/models/__init__.py
index b7b3ca04..66afcf29 100644
--- a/services/git/src/stackit/git/models/__init__.py
+++ b/services/git/src/stackit/git/models/__init__.py
@@ -4,9 +4,9 @@
 """
     STACKIT Git API
 
-    Manage STACKIT Git instances.
+    STACKIT Git management API.
 
-    The version of the OpenAPI document: 1beta.0.3
+    The version of the OpenAPI document: 1beta.0.4
     Contact: git@stackit.cloud
     Generated by OpenAPI Generator (https://openapi-generator.tech)
 
@@ -16,9 +16,12 @@
 
 # import models into model package
 from stackit.git.models.create_instance_payload import CreateInstancePayload
+from stackit.git.models.flavor import Flavor
+from stackit.git.models.generic_error_response import GenericErrorResponse
 from stackit.git.models.instance import Instance
 from stackit.git.models.internal_server_error_response import (
     InternalServerErrorResponse,
 )
+from stackit.git.models.list_flavors import ListFlavors
 from stackit.git.models.list_instances import ListInstances
 from stackit.git.models.unauthorized_response import UnauthorizedResponse
diff --git a/services/git/src/stackit/git/models/create_instance_payload.py b/services/git/src/stackit/git/models/create_instance_payload.py
index 793f64da..ab930f32 100644
--- a/services/git/src/stackit/git/models/create_instance_payload.py
+++ b/services/git/src/stackit/git/models/create_instance_payload.py
@@ -3,9 +3,9 @@
 """
     STACKIT Git API
 
-    Manage STACKIT Git instances.
+    STACKIT Git management API.
 
-    The version of the OpenAPI document: 1beta.0.3
+    The version of the OpenAPI document: 1beta.0.4
     Contact: git@stackit.cloud
     Generated by OpenAPI Generator (https://openapi-generator.tech)
 
@@ -19,19 +19,25 @@
 import re
 from typing import Any, ClassVar, Dict, List, Optional, Set
 
-from pydantic import BaseModel, ConfigDict, Field, field_validator
+from pydantic import BaseModel, ConfigDict, Field, StrictStr, field_validator
 from typing_extensions import Annotated, Self
 
 
 class CreateInstancePayload(BaseModel):
     """
-    Request a STACKIT Git instance to be created with these properties.
+    Instance creation configuration options.
     """
 
+    acl: Optional[Annotated[List[StrictStr], Field(max_length=5)]] = Field(
+        default=None, description="Restricted ACL for instance access."
+    )
+    flavor: Optional[StrictStr] = Field(
+        default="git-100", description="Instance flavor. Defaults to git-100 if not specified."
+    )
     name: Annotated[str, Field(min_length=5, strict=True, max_length=32)] = Field(
         description="A user chosen name to distinguish multiple STACKIT Git instances."
     )
-    __properties: ClassVar[List[str]] = ["name"]
+    __properties: ClassVar[List[str]] = ["acl", "flavor", "name"]
 
     @field_validator("name")
     def name_validate_regular_expression(cls, value):
@@ -88,5 +94,11 @@ def from_dict(cls, obj: Optional[Dict[str, Any]]) -> Optional[Self]:
         if not isinstance(obj, dict):
             return cls.model_validate(obj)
 
-        _obj = cls.model_validate({"name": obj.get("name")})
+        _obj = cls.model_validate(
+            {
+                "acl": obj.get("acl"),
+                "flavor": obj.get("flavor") if obj.get("flavor") is not None else "git-100",
+                "name": obj.get("name"),
+            }
+        )
         return _obj
diff --git a/services/git/src/stackit/git/models/flavor.py b/services/git/src/stackit/git/models/flavor.py
new file mode 100644
index 00000000..5475660f
--- /dev/null
+++ b/services/git/src/stackit/git/models/flavor.py
@@ -0,0 +1,99 @@
+# coding: utf-8
+
+"""
+    STACKIT Git API
+
+    STACKIT Git management API.
+
+    The version of the OpenAPI document: 1beta.0.4
+    Contact: git@stackit.cloud
+    Generated by OpenAPI Generator (https://openapi-generator.tech)
+
+    Do not edit the class manually.
+"""  # noqa: E501 docstring might be too long
+
+from __future__ import annotations
+
+import json
+import pprint
+from typing import Any, ClassVar, Dict, List, Optional, Set
+
+from pydantic import BaseModel, ConfigDict, Field, StrictStr, field_validator
+from typing_extensions import Annotated, Self
+
+
+class Flavor(BaseModel):
+    """
+    Describes a STACKIT Git Flavor.
+    """
+
+    availability: StrictStr = Field(description="Defines the flavor availability.")
+    description: StrictStr = Field(description="Flavor description.")
+    display_name: StrictStr = Field(description="The display name that will be shown in the Portal.")
+    id: Annotated[str, Field(strict=True, max_length=36)] = Field(description="Flavor id.")
+    __properties: ClassVar[List[str]] = ["availability", "description", "display_name", "id"]
+
+    @field_validator("availability")
+    def availability_validate_enum(cls, value):
+        """Validates the enum"""
+        if value not in set(["available", "unavailable", "internal", "deprecated"]):
+            raise ValueError("must be one of enum values ('available', 'unavailable', 'internal', 'deprecated')")
+        return value
+
+    model_config = ConfigDict(
+        populate_by_name=True,
+        validate_assignment=True,
+        protected_namespaces=(),
+    )
+
+    def to_str(self) -> str:
+        """Returns the string representation of the model using alias"""
+        return pprint.pformat(self.model_dump(by_alias=True))
+
+    def to_json(self) -> str:
+        """Returns the JSON representation of the model using alias"""
+        # TODO: pydantic v2: use .model_dump_json(by_alias=True, exclude_unset=True) instead
+        return json.dumps(self.to_dict())
+
+    @classmethod
+    def from_json(cls, json_str: str) -> Optional[Self]:
+        """Create an instance of Flavor from a JSON string"""
+        return cls.from_dict(json.loads(json_str))
+
+    def to_dict(self) -> Dict[str, Any]:
+        """Return the dictionary representation of the model using alias.
+
+        This has the following differences from calling pydantic's
+        `self.model_dump(by_alias=True)`:
+
+        * `None` is only added to the output dict for nullable fields that
+          were set at model initialization. Other fields with value `None`
+          are ignored.
+        """
+        excluded_fields: Set[str] = set([])
+
+        _dict = self.model_dump(
+            by_alias=True,
+            exclude=excluded_fields,
+            exclude_none=True,
+        )
+        return _dict
+
+    @classmethod
+    def from_dict(cls, obj: Optional[Dict[str, Any]]) -> Optional[Self]:
+        """Create an instance of Flavor from a dict"""
+        if obj is None:
+            return None
+
+        if not isinstance(obj, dict):
+            return cls.model_validate(obj)
+
+        _obj = cls.model_validate(
+            {
+                "availability": obj.get("availability"),
+                "description": obj.get("description"),
+                "display_name": obj.get("display_name"),
+                "id": obj.get("id"),
+            }
+        )
+        return _obj
diff --git a/services/git/src/stackit/git/models/generic_error_response.py b/services/git/src/stackit/git/models/generic_error_response.py
new file mode 100644
index 00000000..36ffb1b6
--- /dev/null
+++ b/services/git/src/stackit/git/models/generic_error_response.py
@@ -0,0 +1,83 @@
+# coding: utf-8
+
+"""
+    STACKIT Git API
+
+    STACKIT Git management API.
+
+    The version of the OpenAPI document: 1beta.0.4
+    Contact: git@stackit.cloud
+    Generated by OpenAPI Generator (https://openapi-generator.tech)
+
+    Do not edit the class manually.
+"""  # noqa: E501 docstring might be too long
+
+from __future__ import annotations
+
+import json
+import pprint
+from typing import Any, ClassVar, Dict, List, Optional, Set
+
+from pydantic import BaseModel, ConfigDict, StrictStr
+from typing_extensions import Self
+
+
+class GenericErrorResponse(BaseModel):
+    """
+    Generic Error Response.
+    """
+
+    details: Optional[List[StrictStr]] = None
+    message: StrictStr
+    __properties: ClassVar[List[str]] = ["details", "message"]
+
+    model_config = ConfigDict(
+        populate_by_name=True,
+        validate_assignment=True,
+        protected_namespaces=(),
+    )
+
+    def to_str(self) -> str:
+        """Returns the string representation of the model using alias"""
+        return pprint.pformat(self.model_dump(by_alias=True))
+
+    def to_json(self) -> str:
+        """Returns the JSON representation of the model using alias"""
+        # TODO: pydantic v2: use .model_dump_json(by_alias=True, exclude_unset=True) instead
+        return json.dumps(self.to_dict())
+
+    @classmethod
+    def from_json(cls, json_str: str) -> Optional[Self]:
+        """Create an instance of GenericErrorResponse from a JSON string"""
+        return cls.from_dict(json.loads(json_str))
+
+    def to_dict(self) -> Dict[str, Any]:
+        """Return the dictionary representation of the model using alias.
+
+        This has the following differences from calling pydantic's
+        `self.model_dump(by_alias=True)`:
+
+        * `None` is only added to the output dict for nullable fields that
+          were set at model initialization. Other fields with value `None`
+          are ignored.
+        """
+        excluded_fields: Set[str] = set([])
+
+        _dict = self.model_dump(
+            by_alias=True,
+            exclude=excluded_fields,
+            exclude_none=True,
+        )
+        return _dict
+
+    @classmethod
+    def from_dict(cls, obj: Optional[Dict[str, Any]]) -> Optional[Self]:
+        """Create an instance of GenericErrorResponse from a dict"""
+        if obj is None:
+            return None
+
+        if not isinstance(obj, dict):
+            return cls.model_validate(obj)
+
+        _obj = cls.model_validate({"details": obj.get("details"), "message": obj.get("message")})
+        return _obj
diff --git a/services/git/src/stackit/git/models/instance.py b/services/git/src/stackit/git/models/instance.py
index f500b2d2..aeabd26e 100644
--- a/services/git/src/stackit/git/models/instance.py
+++ b/services/git/src/stackit/git/models/instance.py
@@ -3,9 +3,9 @@
 """
     STACKIT Git API
 
-    Manage STACKIT Git instances.
+    STACKIT Git management API.
 
-    The version of the OpenAPI document: 1beta.0.3
+    The version of the OpenAPI document: 1beta.0.4
     Contact: git@stackit.cloud
     Generated by OpenAPI Generator (https://openapi-generator.tech)
 
@@ -16,35 +16,52 @@
 
 import json
 import pprint
+import re
 from datetime import datetime
 from typing import Any, ClassVar, Dict, List, Optional, Set
 
-from pydantic import BaseModel, ConfigDict, Field, field_validator
+from pydantic import BaseModel, ConfigDict, Field, StrictStr, field_validator
 from typing_extensions import Annotated, Self
 
 
 class Instance(BaseModel):
     """
-    Describes a STACKIT Git instance.
+    Information about an Instance.
     """
 
-    created: datetime = Field(description="The date and time the creation of the STACKIT Git instance was triggered.")
-    id: Annotated[str, Field(strict=True, max_length=36)] = Field(
-        description="A auto generated unique id which identifies the STACKIT Git instances."
-    )
-    name: Annotated[str, Field(strict=True, max_length=32)] = Field(
-        description="A user chosen name to distinguish multiple STACKIT Git instances."
-    )
+    acl: List[StrictStr] = Field(description="Restricted ACL for instance access.")
+    consumed_disk: StrictStr = Field(description="How many bytes of disk space is consumed. Read Only.")
+    consumed_object_storage: StrictStr = Field(description="How many bytes of Object Storage is consumed. Read Only.")
+    created: datetime = Field(description="Instance creation timestamp in RFC3339 format.")
+    flavor: StrictStr = Field(description="Instance flavor.")
+    id: Annotated[str, Field(min_length=36, strict=True, max_length=36)] = Field(description="Instance identifier.")
+    name: Annotated[str, Field(strict=True, max_length=32)] = Field(description="Instance name.")
     state: Annotated[str, Field(strict=True, max_length=32)] = Field(
-        description="The current state of the STACKIT Git instance."
-    )
-    url: Annotated[str, Field(strict=True, max_length=2048)] = Field(
-        description="The URL for reaching the STACKIT Git instance."
-    )
-    version: Annotated[str, Field(strict=True, max_length=20)] = Field(
-        description="The current version of STACKIT Git deployed to the instance."
+        description="Indicate the readiness state of the instance."
     )
-    __properties: ClassVar[List[str]] = ["created", "id", "name", "state", "url", "version"]
+    url: Annotated[str, Field(strict=True, max_length=512)] = Field(description="Instance url.")
+    version: Annotated[str, Field(strict=True, max_length=20)] = Field(description="STACKIT Git version indicator.")
+    __properties: ClassVar[List[str]] = [
+        "acl",
+        "consumed_disk",
+        "consumed_object_storage",
+        "created",
+        "flavor",
+        "id",
+        "name",
+        "state",
+        "url",
+        "version",
+    ]
+
+    @field_validator("id")
+    def id_validate_regular_expression(cls, value):
+        """Validates the regular expression"""
+        if not re.match(r"^[0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12}$", value):
+            raise ValueError(
+                r"must validate the regular expression /^[0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12}$/"
+            )
+        return value
 
     @field_validator("state")
     def state_validate_enum(cls, value):
@@ -105,7 +122,11 @@ def from_dict(cls, obj: Optional[Dict[str, Any]]) -> Optional[Self]:
 
         _obj = cls.model_validate(
             {
+                "acl": obj.get("acl"),
+                "consumed_disk": obj.get("consumed_disk"),
+                "consumed_object_storage": obj.get("consumed_object_storage"),
                 "created": obj.get("created"),
+                "flavor": obj.get("flavor"),
                 "id": obj.get("id"),
                 "name": obj.get("name"),
                 "state": obj.get("state"),
diff --git a/services/git/src/stackit/git/models/internal_server_error_response.py b/services/git/src/stackit/git/models/internal_server_error_response.py
index bae89830..0789f80c 100644
--- a/services/git/src/stackit/git/models/internal_server_error_response.py
+++ b/services/git/src/stackit/git/models/internal_server_error_response.py
@@ -3,9 +3,9 @@
 """
     STACKIT Git API
 
-    Manage STACKIT Git instances.
+    STACKIT Git management API.
 
-    The version of the OpenAPI document: 1beta.0.3
+    The version of the OpenAPI document: 1beta.0.4
     Contact: git@stackit.cloud
     Generated by OpenAPI Generator (https://openapi-generator.tech)
 
diff --git a/services/git/src/stackit/git/models/list_flavors.py b/services/git/src/stackit/git/models/list_flavors.py
new file mode 100644
index 00000000..1d2fb2d8
--- /dev/null
+++ b/services/git/src/stackit/git/models/list_flavors.py
@@ -0,0 +1,97 @@
+# coding: utf-8
+
+"""
+    STACKIT Git API
+
+    STACKIT Git management API.
+
+    The version of the OpenAPI document: 1beta.0.4
+    Contact: git@stackit.cloud
+    Generated by OpenAPI Generator (https://openapi-generator.tech)
+
+    Do not edit the class manually.
+"""  # noqa: E501 docstring might be too long
+
+from __future__ import annotations
+
+import json
+import pprint
+from typing import Any, ClassVar, Dict, List, Optional, Set
+
+from pydantic import BaseModel, ConfigDict
+from typing_extensions import Self
+
+from stackit.git.models.flavor import Flavor
+
+
+class ListFlavors(BaseModel):
+    """
+    A list of STACKIT Git flavors.
+    """
+
+    flavors: List[Flavor]
+    __properties: ClassVar[List[str]] = ["flavors"]
+
+    model_config = ConfigDict(
+        populate_by_name=True,
+        validate_assignment=True,
+        protected_namespaces=(),
+    )
+
+    def to_str(self) -> str:
+        """Returns the string representation of the model using alias"""
+        return pprint.pformat(self.model_dump(by_alias=True))
+
+    def to_json(self) -> str:
+        """Returns the JSON representation of the model using alias"""
+        # TODO: pydantic v2: use .model_dump_json(by_alias=True, exclude_unset=True) instead
+        return json.dumps(self.to_dict())
+
+    @classmethod
+    def from_json(cls, json_str: str) -> Optional[Self]:
+        """Create an instance of ListFlavors from a JSON string"""
+        return cls.from_dict(json.loads(json_str))
+
+    def to_dict(self) -> Dict[str, Any]:
+        """Return the dictionary representation of the model using alias.
+
+        This has the following differences from calling pydantic's
+        `self.model_dump(by_alias=True)`:
+
+        * `None` is only added to the output dict for nullable fields that
+          were set at model initialization. Other fields with value `None`
+          are ignored.
+        """
+        excluded_fields: Set[str] = set([])
+
+        _dict = self.model_dump(
+            by_alias=True,
+            exclude=excluded_fields,
+            exclude_none=True,
+        )
+        # override the default output from pydantic by calling `to_dict()` of each item in flavors (list)
+        _items = []
+        if self.flavors:
+            for _item in self.flavors:
+                if _item:
+                    _items.append(_item.to_dict())
+            _dict["flavors"] = _items
+        return _dict
+
+    @classmethod
+    def from_dict(cls, obj: Optional[Dict[str, Any]]) -> Optional[Self]:
+        """Create an instance of ListFlavors from a dict"""
+        if obj is None:
+            return None
+
+        if not isinstance(obj, dict):
+            return cls.model_validate(obj)
+
+        _obj = cls.model_validate(
+            {
+                "flavors": (
+                    [Flavor.from_dict(_item) for _item in obj["flavors"]] if obj.get("flavors") is not None else None
+                )
+            }
+        )
+        return _obj
diff --git a/services/git/src/stackit/git/models/list_instances.py b/services/git/src/stackit/git/models/list_instances.py
index 76ccd7ee..f4afc5bf 100644
--- a/services/git/src/stackit/git/models/list_instances.py
+++ b/services/git/src/stackit/git/models/list_instances.py
@@ -3,9 +3,9 @@
 """
     STACKIT Git API
 
-    Manage STACKIT Git instances.
+    STACKIT Git management API.
 
-    The version of the OpenAPI document: 1beta.0.3
+    The version of the OpenAPI document: 1beta.0.4
     Contact: git@stackit.cloud
     Generated by OpenAPI Generator (https://openapi-generator.tech)
 
@@ -26,10 +26,10 @@
 
 class ListInstances(BaseModel):
     """
-    A list of STACKIT Git instances.
+    List of Instances.
     """
 
-    instances: Annotated[List[Instance], Field(max_length=50)]
+    instances: Annotated[List[Instance], Field(max_length=100)]
     __properties: ClassVar[List[str]] = ["instances"]
 
     model_config = ConfigDict(
diff --git a/services/git/src/stackit/git/models/unauthorized_response.py b/services/git/src/stackit/git/models/unauthorized_response.py
index b5f5b673..caeb666d 100644
--- a/services/git/src/stackit/git/models/unauthorized_response.py
+++ b/services/git/src/stackit/git/models/unauthorized_response.py
@@ -3,9 +3,9 @@
 """
     STACKIT Git API
 
-    Manage STACKIT Git instances.
+    STACKIT Git management API.
 
-    The version of the OpenAPI document: 1beta.0.3
+    The version of the OpenAPI document: 1beta.0.4
     Contact: git@stackit.cloud
     Generated by OpenAPI Generator (https://openapi-generator.tech)
 
diff --git a/services/git/src/stackit/git/rest.py b/services/git/src/stackit/git/rest.py
index 209072ea..6d2aaf59 100644
--- a/services/git/src/stackit/git/rest.py
+++ b/services/git/src/stackit/git/rest.py
@@ -3,9 +3,9 @@
 """
     STACKIT Git API
 
-    Manage STACKIT Git instances.
+    STACKIT Git management API.
 
-    The version of the OpenAPI document: 1beta.0.3
+    The version of the OpenAPI document: 1beta.0.4
     Contact: git@stackit.cloud
     Generated by OpenAPI Generator (https://openapi-generator.tech)