diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index eae0d61..27b6866 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -35,10 +35,10 @@ jobs:
       - name: Run lints
         run: ./scripts/lint
 
-  upload:
+  build:
     if: github.repository == 'stainless-sdks/knock-python' && (github.event_name == 'push' || github.event.pull_request.head.repo.fork)
     timeout-minutes: 10
-    name: upload
+    name: build
     permissions:
       contents: read
       id-token: write
@@ -46,6 +46,20 @@ jobs:
     steps:
       - uses: actions/checkout@v4
 
+      - name: Install Rye
+        run: |
+          curl -sSf https://rye.astral.sh/get | bash
+          echo "$HOME/.rye/shims" >> $GITHUB_PATH
+        env:
+          RYE_VERSION: '0.44.0'
+          RYE_INSTALL_OPTION: '--yes'
+
+      - name: Install dependencies
+        run: rye sync --all-features
+
+      - name: Run build
+        run: rye build
+
       - name: Get GitHub OIDC Token
         id: github-oidc
         uses: actions/github-script@v6
diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index c3c9552..eb4e0db 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -1,3 +1,3 @@
 {
-  ".": "1.9.0"
+  ".": "1.10.0"
 }
\ No newline at end of file
diff --git a/.stats.yml b/.stats.yml
index dbb9c52..f2f0049 100644
--- a/.stats.yml
+++ b/.stats.yml
@@ -1,4 +1,4 @@
 configured_endpoints: 89
-openapi_spec_url: https://storage.googleapis.com/stainless-sdk-openapi-specs/knock%2Fknock-fa68e7353b6d2eb51af35279f2f591a7d6168c5ade69c3cf40b5aae119ebcce1.yml
-openapi_spec_hash: f9315c4f1d89624aa2447499dbfe734c
-config_hash: b4c547c1d4c8cd0834bc793ddf5388ee
+openapi_spec_url: https://storage.googleapis.com/stainless-sdk-openapi-specs/knock%2Fknock-592610bb4a05ea45115eba7544acd8efbab327749d0f78bd83e164aa305dc0a7.yml
+openapi_spec_hash: 6a65b9127625d9479ba6bff2ba3f8d37
+config_hash: c835f0912492c3f1189f78f876c7c90c
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 0dd2d87..de62b44 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,29 @@
 # Changelog
 
+## 1.10.0 (2025-07-15)
+
+Full Changelog: [v1.9.0...v1.10.0](https://github.com/knocklabs/knock-python/compare/v1.9.0...v1.10.0)
+
+### Features
+
+* **api:** api update ([7673085](https://github.com/knocklabs/knock-python/commit/7673085795939d4ce7e23cf0f2926fa8c6a08978))
+* **api:** api update ([b9f028b](https://github.com/knocklabs/knock-python/commit/b9f028b69089460aa522b023a272182803b6143c))
+* clean up environment call outs ([fb2f0d5](https://github.com/knocklabs/knock-python/commit/fb2f0d522f82069c40d931fe26722fc52be70967))
+
+
+### Bug Fixes
+
+* **client:** don't send Content-Type header on GET requests ([64799d2](https://github.com/knocklabs/knock-python/commit/64799d2f0f8288c23e86ed7df45eeb211866ac0b))
+* **parsing:** correctly handle nested discriminated unions ([e8e1932](https://github.com/knocklabs/knock-python/commit/e8e1932417093bf612a0705cc7fada4a980f3a39))
+
+
+### Chores
+
+* **ci:** change upload type ([e71a7c5](https://github.com/knocklabs/knock-python/commit/e71a7c512b98a9910e1596462504105cf3e9d58d))
+* **internal:** bump pinned h11 dep ([f2b5336](https://github.com/knocklabs/knock-python/commit/f2b53364b5dd9cfcc15bea2204dc42bc6e49d0f6))
+* **package:** mark python 3.13 as supported ([ee5b244](https://github.com/knocklabs/knock-python/commit/ee5b244a23c584a6ccd61e85c56bb9e3e85dcb8d))
+* **readme:** fix version rendering on pypi ([a2fae26](https://github.com/knocklabs/knock-python/commit/a2fae26e5dfa3c003f3f1cf2b45bf55fe47db724))
+
 ## 1.9.0 (2025-06-30)
 
 Full Changelog: [v1.8.1...v1.9.0](https://github.com/knocklabs/knock-python/compare/v1.8.1...v1.9.0)
diff --git a/README.md b/README.md
index bd20f9a..432a104 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,7 @@
 # Knock Python API library
 
-[![PyPI version](<https://img.shields.io/pypi/v/knockapi.svg?label=pypi%20(stable)>)](https://pypi.org/project/knockapi/)
+<!-- prettier-ignore -->
+[![PyPI version](https://img.shields.io/pypi/v/knockapi.svg?label=pypi%20(stable))](https://pypi.org/project/knockapi/)
 
 The Knock Python library provides convenient access to the Knock REST API from any Python 3.8+
 application. The library includes type definitions for all request params and response fields,
@@ -86,7 +87,6 @@ pip install knockapi[aiohttp]
 Then you can enable it by instantiating the client with `http_client=DefaultAioHttpClient()`:
 
 ```python
-import os
 import asyncio
 from knockapi import DefaultAioHttpClient
 from knockapi import AsyncKnock
@@ -94,7 +94,7 @@ from knockapi import AsyncKnock
 
 async def main() -> None:
     async with AsyncKnock(
-        api_key=os.environ.get("KNOCK_API_KEY"),  # This is the default and can be omitted
+        api_key="My API Key",
         http_client=DefaultAioHttpClient(),
     ) as client:
         response = await client.workflows.trigger(
diff --git a/pyproject.toml b/pyproject.toml
index e6f0854..d933e7a 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [project]
 name = "knockapi"
-version = "1.9.0"
+version = "1.10.0"
 description = "The official Python library for the knock API"
 dynamic = ["readme"]
 license = "Apache-2.0"
@@ -24,6 +24,7 @@ classifiers = [
   "Programming Language :: Python :: 3.10",
   "Programming Language :: Python :: 3.11",
   "Programming Language :: Python :: 3.12",
+  "Programming Language :: Python :: 3.13",
   "Operating System :: OS Independent",
   "Operating System :: POSIX",
   "Operating System :: MacOS",
@@ -38,7 +39,7 @@ Homepage = "https://github.com/knocklabs/knock-python"
 Repository = "https://github.com/knocklabs/knock-python"
 
 [project.optional-dependencies]
-aiohttp = ["aiohttp", "httpx_aiohttp>=0.1.6"]
+aiohttp = ["aiohttp", "httpx_aiohttp>=0.1.8"]
 
 [tool.rye]
 managed = true
diff --git a/requirements-dev.lock b/requirements-dev.lock
index cec598e..ed67aae 100644
--- a/requirements-dev.lock
+++ b/requirements-dev.lock
@@ -48,15 +48,15 @@ filelock==3.12.4
 frozenlist==1.6.2
     # via aiohttp
     # via aiosignal
-h11==0.14.0
+h11==0.16.0
     # via httpcore
-httpcore==1.0.2
+httpcore==1.0.9
     # via httpx
 httpx==0.28.1
     # via httpx-aiohttp
     # via knockapi
     # via respx
-httpx-aiohttp==0.1.6
+httpx-aiohttp==0.1.8
     # via knockapi
 idna==3.4
     # via anyio
diff --git a/requirements.lock b/requirements.lock
index 3385b79..e36853c 100644
--- a/requirements.lock
+++ b/requirements.lock
@@ -36,14 +36,14 @@ exceptiongroup==1.2.2
 frozenlist==1.6.2
     # via aiohttp
     # via aiosignal
-h11==0.14.0
+h11==0.16.0
     # via httpcore
-httpcore==1.0.2
+httpcore==1.0.9
     # via httpx
 httpx==0.28.1
     # via httpx-aiohttp
     # via knockapi
-httpx-aiohttp==0.1.6
+httpx-aiohttp==0.1.8
     # via knockapi
 idna==3.4
     # via anyio
diff --git a/scripts/utils/upload-artifact.sh b/scripts/utils/upload-artifact.sh
index 597153b..9dbd17e 100755
--- a/scripts/utils/upload-artifact.sh
+++ b/scripts/utils/upload-artifact.sh
@@ -1,7 +1,9 @@
 #!/usr/bin/env bash
 set -exuo pipefail
 
-RESPONSE=$(curl -X POST "$URL" \
+FILENAME=$(basename dist/*.whl)
+
+RESPONSE=$(curl -X POST "$URL?filename=$FILENAME" \
   -H "Authorization: Bearer $AUTH" \
   -H "Content-Type: application/json")
 
@@ -12,13 +14,13 @@ if [[ "$SIGNED_URL" == "null" ]]; then
   exit 1
 fi
 
-UPLOAD_RESPONSE=$(tar -cz . | curl -v -X PUT \
-  -H "Content-Type: application/gzip" \
-  --data-binary @- "$SIGNED_URL" 2>&1)
+UPLOAD_RESPONSE=$(curl -v -X PUT \
+  -H "Content-Type: binary/octet-stream" \
+  --data-binary "@dist/$FILENAME" "$SIGNED_URL" 2>&1)
 
 if echo "$UPLOAD_RESPONSE" | grep -q "HTTP/[0-9.]* 200"; then
   echo -e "\033[32mUploaded build to Stainless storage.\033[0m"
-  echo -e "\033[32mInstallation: pip install 'https://pkg.stainless.com/s/knock-python/$SHA'\033[0m"
+  echo -e "\033[32mInstallation: pip install 'https://pkg.stainless.com/s/knock-python/$SHA/$FILENAME'\033[0m"
 else
   echo -e "\033[31mFailed to upload artifact.\033[0m"
   exit 1
diff --git a/src/knockapi/_base_client.py b/src/knockapi/_base_client.py
index b0599a6..f15433e 100644
--- a/src/knockapi/_base_client.py
+++ b/src/knockapi/_base_client.py
@@ -529,6 +529,15 @@ def _build_request(
             # work around https://github.com/encode/httpx/discussions/2880
             kwargs["extensions"] = {"sni_hostname": prepared_url.host.replace("_", "-")}
 
+        is_body_allowed = options.method.lower() != "get"
+
+        if is_body_allowed:
+            kwargs["json"] = json_data if is_given(json_data) else None
+            kwargs["files"] = files
+        else:
+            headers.pop("Content-Type", None)
+            kwargs.pop("data", None)
+
         # TODO: report this error to httpx
         return self._client.build_request(  # pyright: ignore[reportUnknownMemberType]
             headers=headers,
@@ -540,8 +549,6 @@ def _build_request(
             # so that passing a `TypedDict` doesn't cause an error.
             # https://github.com/microsoft/pyright/issues/3526#event-6715453066
             params=self.qs.stringify(cast(Mapping[str, Any], params)) if params else None,
-            json=json_data if is_given(json_data) else None,
-            files=files,
             **kwargs,
         )
 
diff --git a/src/knockapi/_models.py b/src/knockapi/_models.py
index 4f21498..528d568 100644
--- a/src/knockapi/_models.py
+++ b/src/knockapi/_models.py
@@ -2,9 +2,10 @@
 
 import os
 import inspect
-from typing import TYPE_CHECKING, Any, Type, Union, Generic, TypeVar, Callable, cast
+from typing import TYPE_CHECKING, Any, Type, Union, Generic, TypeVar, Callable, Optional, cast
 from datetime import date, datetime
 from typing_extensions import (
+    List,
     Unpack,
     Literal,
     ClassVar,
@@ -366,7 +367,7 @@ def _construct_field(value: object, field: FieldInfo, key: str) -> object:
     if type_ is None:
         raise RuntimeError(f"Unexpected field type is None for {key}")
 
-    return construct_type(value=value, type_=type_)
+    return construct_type(value=value, type_=type_, metadata=getattr(field, "metadata", None))
 
 
 def is_basemodel(type_: type) -> bool:
@@ -420,7 +421,7 @@ def construct_type_unchecked(*, value: object, type_: type[_T]) -> _T:
     return cast(_T, construct_type(value=value, type_=type_))
 
 
-def construct_type(*, value: object, type_: object) -> object:
+def construct_type(*, value: object, type_: object, metadata: Optional[List[Any]] = None) -> object:
     """Loose coercion to the expected type with construction of nested values.
 
     If the given value does not match the expected type then it is returned as-is.
@@ -438,8 +439,10 @@ def construct_type(*, value: object, type_: object) -> object:
         type_ = type_.__value__  # type: ignore[unreachable]
 
     # unwrap `Annotated[T, ...]` -> `T`
-    if is_annotated_type(type_):
-        meta: tuple[Any, ...] = get_args(type_)[1:]
+    if metadata is not None:
+        meta: tuple[Any, ...] = tuple(metadata)
+    elif is_annotated_type(type_):
+        meta = get_args(type_)[1:]
         type_ = extract_type_arg(type_, 0)
     else:
         meta = tuple()
diff --git a/src/knockapi/_version.py b/src/knockapi/_version.py
index 887fa8d..d6ce324 100644
--- a/src/knockapi/_version.py
+++ b/src/knockapi/_version.py
@@ -1,4 +1,4 @@
 # File generated from our OpenAPI spec by Stainless. See CONTRIBUTING.md for details.
 
 __title__ = "knockapi"
-__version__ = "1.9.0"  # x-release-please-version
+__version__ = "1.10.0"  # x-release-please-version
diff --git a/src/knockapi/resources/schedules/schedules.py b/src/knockapi/resources/schedules/schedules.py
index fb031f4..bf836a7 100644
--- a/src/knockapi/resources/schedules/schedules.py
+++ b/src/knockapi/resources/schedules/schedules.py
@@ -103,10 +103,10 @@ def create(
               (string), an inline user request (object), or an inline object request, which is
               determined by the presence of a `collection` property.
 
-          data: An optional map of data to pass into the workflow execution. There is a 1024
-              byte limit on the size of any single string value (with the exception of
-              [email attachments](/integrations/email/attachments)), and a 10MB limit on the
-              size of the full `data` payload.
+          data: An optional map of data to pass into the workflow execution. There is a 10MB
+              limit on the size of the full `data` payload. Any individual string value
+              greater than 1024 bytes in length will be
+              [truncated](/developer-tools/api-logs#log-truncation) in your logs.
 
           ending_at: The ending date and time for the schedule.
 
@@ -175,10 +175,10 @@ def update(
           actor: A reference to a recipient, either a user identifier (string) or an object
               reference (ID, collection).
 
-          data: An optional map of data to pass into the workflow execution. There is a 1024
-              byte limit on the size of any single string value (with the exception of
-              [email attachments](/integrations/email/attachments)), and a 10MB limit on the
-              size of the full `data` payload.
+          data: An optional map of data to pass into the workflow execution. There is a 10MB
+              limit on the size of the full `data` payload. Any individual string value
+              greater than 1024 bytes in length will be
+              [truncated](/developer-tools/api-logs#log-truncation) in your logs.
 
           ending_at: The ending date and time for the schedule.
 
@@ -374,10 +374,10 @@ async def create(
               (string), an inline user request (object), or an inline object request, which is
               determined by the presence of a `collection` property.
 
-          data: An optional map of data to pass into the workflow execution. There is a 1024
-              byte limit on the size of any single string value (with the exception of
-              [email attachments](/integrations/email/attachments)), and a 10MB limit on the
-              size of the full `data` payload.
+          data: An optional map of data to pass into the workflow execution. There is a 10MB
+              limit on the size of the full `data` payload. Any individual string value
+              greater than 1024 bytes in length will be
+              [truncated](/developer-tools/api-logs#log-truncation) in your logs.
 
           ending_at: The ending date and time for the schedule.
 
@@ -446,10 +446,10 @@ async def update(
           actor: A reference to a recipient, either a user identifier (string) or an object
               reference (ID, collection).
 
-          data: An optional map of data to pass into the workflow execution. There is a 1024
-              byte limit on the size of any single string value (with the exception of
-              [email attachments](/integrations/email/attachments)), and a 10MB limit on the
-              size of the full `data` payload.
+          data: An optional map of data to pass into the workflow execution. There is a 10MB
+              limit on the size of the full `data` payload. Any individual string value
+              greater than 1024 bytes in length will be
+              [truncated](/developer-tools/api-logs#log-truncation) in your logs.
 
           ending_at: The ending date and time for the schedule.
 
diff --git a/src/knockapi/resources/workflows.py b/src/knockapi/resources/workflows.py
index c7d7ffe..e23b0f0 100644
--- a/src/knockapi/resources/workflows.py
+++ b/src/knockapi/resources/workflows.py
@@ -136,10 +136,10 @@ def trigger(
               subsequent cancellation. Should be unique across trigger requests to avoid
               unintentional cancellations.
 
-          data: An optional map of data to pass into the workflow execution. There is a 1024
-              byte limit on the size of any single string value (with the exception of
-              [email attachments](/integrations/email/attachments)), and a 10MB limit on the
-              size of the full `data` payload.
+          data: An optional map of data to pass into the workflow execution. There is a 10MB
+              limit on the size of the full `data` payload. Any individual string value
+              greater than 1024 bytes in length will be
+              [truncated](/developer-tools/api-logs#log-truncation) in your logs.
 
           tenant: An request to set a tenant inline.
 
@@ -282,10 +282,10 @@ async def trigger(
               subsequent cancellation. Should be unique across trigger requests to avoid
               unintentional cancellations.
 
-          data: An optional map of data to pass into the workflow execution. There is a 1024
-              byte limit on the size of any single string value (with the exception of
-              [email attachments](/integrations/email/attachments)), and a 10MB limit on the
-              size of the full `data` payload.
+          data: An optional map of data to pass into the workflow execution. There is a 10MB
+              limit on the size of the full `data` payload. Any individual string value
+              greater than 1024 bytes in length will be
+              [truncated](/developer-tools/api-logs#log-truncation) in your logs.
 
           tenant: An request to set a tenant inline.
 
diff --git a/src/knockapi/types/providers/slack_list_channels_params.py b/src/knockapi/types/providers/slack_list_channels_params.py
index c98c919..0e9ffb4 100644
--- a/src/knockapi/types/providers/slack_list_channels_params.py
+++ b/src/knockapi/types/providers/slack_list_channels_params.py
@@ -38,5 +38,6 @@ class QueryOptions(TypedDict, total=False):
     """
     Mix and match channel types by providing a comma-separated list of any
     combination of public_channel, private_channel, mpim, im. Defaults to
-    `"public_channel,private_channel"`.
+    `"public_channel,private_channel"`. If the user's Slack ID is unavailable, this
+    option is ignored and only public channels are returned.
     """
diff --git a/src/knockapi/types/schedule.py b/src/knockapi/types/schedule.py
index 68db5b0..56fd93e 100644
--- a/src/knockapi/types/schedule.py
+++ b/src/knockapi/types/schedule.py
@@ -40,9 +40,9 @@ class Schedule(BaseModel):
     data: Optional[Dict[str, object]] = None
     """An optional map of data to pass into the workflow execution.
 
-    There is a 1024 byte limit on the size of any single string value (with the
-    exception of [email attachments](/integrations/email/attachments)), and a 10MB
-    limit on the size of the full `data` payload.
+    There is a 10MB limit on the size of the full `data` payload. Any individual
+    string value greater than 1024 bytes in length will be
+    [truncated](/developer-tools/api-logs#log-truncation) in your logs.
     """
 
     last_occurrence_at: Optional[datetime] = None
diff --git a/src/knockapi/types/schedule_create_params.py b/src/knockapi/types/schedule_create_params.py
index b7da2a4..b9956fa 100644
--- a/src/knockapi/types/schedule_create_params.py
+++ b/src/knockapi/types/schedule_create_params.py
@@ -32,9 +32,9 @@ class ScheduleCreateParams(TypedDict, total=False):
     data: Optional[Dict[str, object]]
     """An optional map of data to pass into the workflow execution.
 
-    There is a 1024 byte limit on the size of any single string value (with the
-    exception of [email attachments](/integrations/email/attachments)), and a 10MB
-    limit on the size of the full `data` payload.
+    There is a 10MB limit on the size of the full `data` payload. Any individual
+    string value greater than 1024 bytes in length will be
+    [truncated](/developer-tools/api-logs#log-truncation) in your logs.
     """
 
     ending_at: Annotated[Union[str, datetime, None], PropertyInfo(format="iso8601")]
diff --git a/src/knockapi/types/schedule_update_params.py b/src/knockapi/types/schedule_update_params.py
index 8af465b..8863edd 100644
--- a/src/knockapi/types/schedule_update_params.py
+++ b/src/knockapi/types/schedule_update_params.py
@@ -27,9 +27,9 @@ class ScheduleUpdateParams(TypedDict, total=False):
     data: Optional[Dict[str, object]]
     """An optional map of data to pass into the workflow execution.
 
-    There is a 1024 byte limit on the size of any single string value (with the
-    exception of [email attachments](/integrations/email/attachments)), and a 10MB
-    limit on the size of the full `data` payload.
+    There is a 10MB limit on the size of the full `data` payload. Any individual
+    string value greater than 1024 bytes in length will be
+    [truncated](/developer-tools/api-logs#log-truncation) in your logs.
     """
 
     ending_at: Annotated[Union[str, datetime, None], PropertyInfo(format="iso8601")]
diff --git a/src/knockapi/types/schedules/bulk_create_params.py b/src/knockapi/types/schedules/bulk_create_params.py
index 090a693..6b59e5c 100644
--- a/src/knockapi/types/schedules/bulk_create_params.py
+++ b/src/knockapi/types/schedules/bulk_create_params.py
@@ -34,9 +34,9 @@ class Schedule(TypedDict, total=False):
     data: Optional[Dict[str, object]]
     """An optional map of data to pass into the workflow execution.
 
-    There is a 1024 byte limit on the size of any single string value (with the
-    exception of [email attachments](/integrations/email/attachments)), and a 10MB
-    limit on the size of the full `data` payload.
+    There is a 10MB limit on the size of the full `data` payload. Any individual
+    string value greater than 1024 bytes in length will be
+    [truncated](/developer-tools/api-logs#log-truncation) in your logs.
     """
 
     ending_at: Annotated[Union[str, datetime, None], PropertyInfo(format="iso8601")]
diff --git a/src/knockapi/types/workflow_trigger_params.py b/src/knockapi/types/workflow_trigger_params.py
index 300e75c..9f73210 100644
--- a/src/knockapi/types/workflow_trigger_params.py
+++ b/src/knockapi/types/workflow_trigger_params.py
@@ -39,9 +39,9 @@ class WorkflowTriggerParams(TypedDict, total=False):
     data: Optional[Dict[str, object]]
     """An optional map of data to pass into the workflow execution.
 
-    There is a 1024 byte limit on the size of any single string value (with the
-    exception of [email attachments](/integrations/email/attachments)), and a 10MB
-    limit on the size of the full `data` payload.
+    There is a 10MB limit on the size of the full `data` payload. Any individual
+    string value greater than 1024 bytes in length will be
+    [truncated](/developer-tools/api-logs#log-truncation) in your logs.
     """
 
     tenant: Optional[InlineTenantRequestParam]
diff --git a/tests/test_client.py b/tests/test_client.py
index 1eb01bb..380fc02 100644
--- a/tests/test_client.py
+++ b/tests/test_client.py
@@ -462,7 +462,7 @@ def test_request_extra_query(self) -> None:
     def test_multipart_repeating_array(self, client: Knock) -> None:
         request = client._build_request(
             FinalRequestOptions.construct(
-                method="get",
+                method="post",
                 url="/foo",
                 headers={"Content-Type": "multipart/form-data; boundary=6b7ba517decee4a450543ea6ae821c82"},
                 json_data={"array": ["foo", "bar"]},
@@ -1261,7 +1261,7 @@ def test_request_extra_query(self) -> None:
     def test_multipart_repeating_array(self, async_client: AsyncKnock) -> None:
         request = async_client._build_request(
             FinalRequestOptions.construct(
-                method="get",
+                method="post",
                 url="/foo",
                 headers={"Content-Type": "multipart/form-data; boundary=6b7ba517decee4a450543ea6ae821c82"},
                 json_data={"array": ["foo", "bar"]},
diff --git a/tests/test_models.py b/tests/test_models.py
index 8a84231..86f6091 100644
--- a/tests/test_models.py
+++ b/tests/test_models.py
@@ -889,3 +889,48 @@ class ModelB(BaseModel):
     )
 
     assert isinstance(m, ModelB)
+
+
+def test_nested_discriminated_union() -> None:
+    class InnerType1(BaseModel):
+        type: Literal["type_1"]
+
+    class InnerModel(BaseModel):
+        inner_value: str
+
+    class InnerType2(BaseModel):
+        type: Literal["type_2"]
+        some_inner_model: InnerModel
+
+    class Type1(BaseModel):
+        base_type: Literal["base_type_1"]
+        value: Annotated[
+            Union[
+                InnerType1,
+                InnerType2,
+            ],
+            PropertyInfo(discriminator="type"),
+        ]
+
+    class Type2(BaseModel):
+        base_type: Literal["base_type_2"]
+
+    T = Annotated[
+        Union[
+            Type1,
+            Type2,
+        ],
+        PropertyInfo(discriminator="base_type"),
+    ]
+
+    model = construct_type(
+        type_=T,
+        value={
+            "base_type": "base_type_1",
+            "value": {
+                "type": "type_2",
+            },
+        },
+    )
+    assert isinstance(model, Type1)
+    assert isinstance(model.value, InnerType2)