diff --git a/packages/opencode/src/config/config.ts b/packages/opencode/src/config/config.ts
index ead3a0149b4..ae89ba11b9f 100644
--- a/packages/opencode/src/config/config.ts
+++ b/packages/opencode/src/config/config.ts
@@ -797,6 +797,7 @@ export namespace Config {
         .record(
           z.string(),
           ModelsDev.Model.partial().extend({
+            baseModel: z.string().optional().describe("Base model ID to inherit metadata from"),
             variants: z
               .record(
                 z.string(),
diff --git a/packages/opencode/src/provider/provider.ts b/packages/opencode/src/provider/provider.ts
index 9b01eae9e9b..c63189537b0 100644
--- a/packages/opencode/src/provider/provider.ts
+++ b/packages/opencode/src/provider/provider.ts
@@ -217,8 +217,8 @@ export namespace Provider {
         autoload: true,
         options: providerOptions,
         async getModel(sdk: any, modelID: string, options?: Record<string, any>) {
-          // Skip region prefixing if model already has a cross-region inference profile prefix
-          if (modelID.startsWith("global.") || modelID.startsWith("jp.")) {
+          // Skip region prefixing if model already has a cross-region inference profile prefix or is an ARN
+          if (modelID.startsWith("global.") || modelID.startsWith("jp.") || modelID.startsWith("arn:aws:bedrock")) {
             return sdk.languageModel(modelID)
           }
 
@@ -668,16 +668,22 @@ export namespace Provider {
       }
 
       for (const [modelID, model] of Object.entries(provider.models ?? {})) {
-        const existingModel = parsed.models[model.id ?? modelID]
+        const existingModel = model.baseModel
+          ? database[providerID]?.models[model.baseModel]
+          : parsed.models[model.id ?? modelID]
         const name = iife(() => {
           if (model.name) return model.name
           if (model.id && model.id !== modelID) return modelID
+          // For ARN models, extract the profile ID (last portion after /)
+          if (modelID.startsWith("arn:aws:bedrock") && modelID.includes("/")) {
+            return modelID.split("/").pop() ?? modelID
+          }
           return existingModel?.name ?? modelID
         })
         const parsedModel: Model = {
           id: modelID,
           api: {
-            id: model.id ?? existingModel?.api.id ?? modelID,
+            id: model.id ?? (model.baseModel ? modelID : existingModel?.api.id) ?? modelID,
             npm:
               model.provider?.npm ??
               provider.npm ??
diff --git a/packages/opencode/test/provider/amazon-bedrock.test.ts b/packages/opencode/test/provider/amazon-bedrock.test.ts
index d10e851391e..5386e5df531 100644
--- a/packages/opencode/test/provider/amazon-bedrock.test.ts
+++ b/packages/opencode/test/provider/amazon-bedrock.test.ts
@@ -203,3 +203,103 @@ test("Bedrock: includes custom endpoint in options when specified", async () =>
     },
   })
 })
+
+test("Bedrock: custom AIP models with baseModel are loaded correctly", async () => {
+  await using tmp = await tmpdir({
+    init: async (dir) => {
+      await Bun.write(
+        path.join(dir, "opencode.json"),
+        JSON.stringify({
+          $schema: "https://opencode.ai/config.json",
+          provider: {
+            "amazon-bedrock": {
+              options: {
+                region: "us-east-1",
+              },
+              models: {
+                "arn:aws:bedrock:us-east-1:123456789012:application-inference-profile/test-profile-id": {
+                  baseModel: "anthropic.claude-3-5-sonnet-20240620-v1:0",
+                },
+              },
+            },
+          },
+        }),
+      )
+    },
+  })
+  await Instance.provide({
+    directory: tmp.path,
+    init: async () => {
+      Env.set("AWS_PROFILE", "default")
+    },
+    fn: async () => {
+      const providers = await Provider.list()
+      const bedrockProvider = providers["amazon-bedrock"]
+      expect(bedrockProvider).toBeDefined()
+
+      const aipModel = bedrockProvider.models["arn:aws:bedrock:us-east-1:123456789012:application-inference-profile/test-profile-id"]
+      expect(aipModel).toBeDefined()
+
+      // Should use ARN as api.id (not the base model ID)
+      expect(aipModel.api.id).toBe("arn:aws:bedrock:us-east-1:123456789012:application-inference-profile/test-profile-id")
+
+      // Should extract profile ID as display name when no explicit name is provided
+      expect(aipModel.name).toBe("test-profile-id")
+
+      // Should have model ID set to the ARN
+      expect(aipModel.id).toBe("arn:aws:bedrock:us-east-1:123456789012:application-inference-profile/test-profile-id")
+    },
+  })
+})
+
+test("Bedrock: custom AIP models can override name and other fields", async () => {
+  await using tmp = await tmpdir({
+    init: async (dir) => {
+      await Bun.write(
+        path.join(dir, "opencode.json"),
+        JSON.stringify({
+          $schema: "https://opencode.ai/config.json",
+          provider: {
+            "amazon-bedrock": {
+              options: {
+                region: "us-east-1",
+              },
+              models: {
+                "arn:aws:bedrock:us-east-1:123456789012:application-inference-profile/custom-aip": {
+                  baseModel: "anthropic.claude-3-5-sonnet-20240620-v1:0",
+                  name: "My Custom AIP Model",
+                  limit: {
+                    context: 500000,
+                    output: 16000,
+                  },
+                },
+              },
+            },
+          },
+        }),
+      )
+    },
+  })
+  await Instance.provide({
+    directory: tmp.path,
+    init: async () => {
+      Env.set("AWS_PROFILE", "default")
+    },
+    fn: async () => {
+      const providers = await Provider.list()
+      const aipModel = providers["amazon-bedrock"].models["arn:aws:bedrock:us-east-1:123456789012:application-inference-profile/custom-aip"]
+
+      expect(aipModel).toBeDefined()
+
+      // Should use custom name instead of extracted profile ID
+      expect(aipModel.name).toBe("My Custom AIP Model")
+
+      // Should use custom context and output limits
+      expect(aipModel.limit.context).toBe(500000)
+      expect(aipModel.limit.output).toBe(16000)
+
+      // Should use ARN as api.id
+      expect(aipModel.api.id).toBe("arn:aws:bedrock:us-east-1:123456789012:application-inference-profile/custom-aip")
+    },
+  })
+})