diff --git a/packages/core/src/aisdk-native.ts b/packages/core/src/aisdk-native.ts
index 9e8a587591c..61502d8bc1e 100644
--- a/packages/core/src/aisdk-native.ts
+++ b/packages/core/src/aisdk-native.ts
@@ -14,12 +14,17 @@ export interface MapInput {
   readonly packageName: string | undefined
   readonly settings: Readonly<Record<string, unknown>>
   readonly modelID: string
-  readonly hasCredential?: boolean
 }
 
 export function map(input: MapInput): Mapping | undefined {
   const baseSettings = mapBaseSettings(input.settings)
   switch (input.packageName) {
+    case "@ai-sdk/amazon-bedrock":
+      return {
+        package: "@opencode-ai/ai/providers/amazon-bedrock",
+        settings: mapBedrockSettings(input.settings, baseSettings),
+        ...mapBedrockRequest(input),
+      }
     case "@ai-sdk/amazon-bedrock/mantle":
       return mapBedrockMantle(input, baseSettings)
     case "@ai-sdk/google":
@@ -47,6 +52,21 @@ export function map(input: MapInput): Mapping | undefined {
 
 function mapBedrockMantle(input: MapInput, baseSettings: Readonly<Record<string, unknown>>): Mapping | undefined {
   const settings = input.settings
+  const chat = input.modelID === "openai.gpt-oss-safeguard-20b" || input.modelID === "openai.gpt-oss-safeguard-120b"
+  return {
+    package: `@opencode-ai/ai/providers/amazon-bedrock/mantle/${chat ? "chat" : "responses"}`,
+    settings: {
+      ...mapBedrockSettings(settings, baseSettings),
+      ...mapOpenAIOptions(settings),
+    },
+    ...(isStringRecord(settings.headers) ? { headers: settings.headers } : {}),
+  }
+}
+
+function mapBedrockSettings(
+  settings: Readonly<Record<string, unknown>>,
+  baseSettings: Readonly<Record<string, unknown>>,
+) {
   const apiKey =
     typeof settings.apiKey === "string"
       ? settings.apiKey
@@ -54,20 +74,69 @@ function mapBedrockMantle(input: MapInput, baseSettings: Readonly<Record<string,
         ? settings.bearerToken
         : undefined
   const credentials = mapBedrockCredentials(settings)
-  if (!input.hasCredential && apiKey === undefined && credentials === undefined) return undefined
-  const chat = input.modelID === "openai.gpt-oss-safeguard-20b" || input.modelID === "openai.gpt-oss-safeguard-120b"
   return {
-    package: `@opencode-ai/ai/providers/amazon-bedrock/mantle/${chat ? "chat" : "responses"}`,
-    settings: {
-      ...baseSettings,
-      ...(typeof settings.baseURL !== "string" && typeof settings.endpoint === "string"
-        ? { baseURL: settings.endpoint }
-        : {}),
-      ...(apiKey === undefined ? {} : { apiKey }),
-      ...(credentials === undefined ? {} : { credentials }),
-      ...(typeof settings.region === "string" ? { region: settings.region } : {}),
-      ...mapOpenAIOptions(settings),
-    },
+    ...baseSettings,
+    ...(typeof settings.baseURL !== "string" && typeof settings.endpoint === "string"
+      ? { baseURL: settings.endpoint }
+      : {}),
+    ...(apiKey === undefined ? {} : { apiKey }),
+    ...(credentials === undefined ? {} : { credentials }),
+    ...(typeof settings.region === "string" ? { region: settings.region } : {}),
+    ...(typeof settings.topP === "number" ? { topP: settings.topP } : {}),
+  }
+}
+
+function mapBedrockRequest(input: MapInput): Pick<Mapping, "headers" | "body"> {
+  const settings = input.settings
+  const headers = isStringRecord(settings.headers) ? settings.headers : undefined
+  const additional = isRecord(settings.additionalModelRequestFields) ? settings.additionalModelRequestFields : {}
+  const reasoning = isRecord(settings.reasoningConfig) ? settings.reasoningConfig : undefined
+  const anthropic = input.modelID.includes("anthropic")
+  const openai = input.modelID.startsWith("openai.")
+  const effort = typeof reasoning?.maxReasoningEffort === "string" ? reasoning.maxReasoningEffort : undefined
+  const type = typeof reasoning?.type === "string" ? reasoning.type : undefined
+  const budget = typeof reasoning?.budgetTokens === "number" ? reasoning.budgetTokens : undefined
+  const display = typeof reasoning?.display === "string" ? reasoning.display : undefined
+  const betas = Array.isArray(settings.anthropicBeta)
+    ? settings.anthropicBeta.filter((item): item is string => typeof item === "string")
+    : []
+  const existingBetas = Array.isArray(additional.anthropic_beta)
+    ? additional.anthropic_beta.filter((item): item is string => typeof item === "string")
+    : []
+  const fields = Provider.mergeOverlay(additional, {
+    ...(betas.length > 0 ? { anthropic_beta: [...existingBetas, ...betas] } : {}),
+    ...(anthropic && type === "enabled" && budget !== undefined
+      ? { thinking: { type: "enabled", budget_tokens: budget } }
+      : {}),
+    ...(anthropic && type === "adaptive"
+      ? { thinking: { type: "adaptive", ...(display === undefined ? {} : { display }) } }
+      : {}),
+    ...(anthropic && effort !== undefined
+      ? {
+          output_config: {
+            ...(isRecord(additional.output_config) ? additional.output_config : {}),
+            effort,
+          },
+        }
+      : {}),
+    ...(!anthropic && openai && effort !== undefined ? { reasoning_effort: effort } : {}),
+    ...(!anthropic && !openai && effort !== undefined
+      ? {
+          reasoningConfig: {
+            ...(type === undefined || type === "adaptive" ? {} : { type }),
+            ...(budget === undefined ? {} : { budgetTokens: budget }),
+            maxReasoningEffort: effort,
+          },
+        }
+      : {}),
+  })
+  const body = {
+    ...(fields && Object.keys(fields).length > 0 ? { additionalModelRequestFields: fields } : {}),
+    ...(typeof settings.serviceTier === "string" ? { serviceTier: { type: settings.serviceTier } } : {}),
+  }
+  return {
+    ...(headers === undefined ? {} : { headers }),
+    ...(Object.keys(body).length === 0 ? {} : { body }),
   }
 }
 
diff --git a/packages/core/src/model-resolver.ts b/packages/core/src/model-resolver.ts
index a9a5b6ef6c5..fbf345a02af 100644
--- a/packages/core/src/model-resolver.ts
+++ b/packages/core/src/model-resolver.ts
@@ -181,7 +181,6 @@ export const fromCatalogModel = (
         packageName,
         settings: configured,
         modelID: resolved.modelID ?? resolved.id,
-        hasCredential: key !== undefined,
       })
     : undefined
   const native = mapping?.package ?? resolved.package
diff --git a/packages/core/test/aisdk-native.test.ts b/packages/core/test/aisdk-native.test.ts
index 841bc061d94..6a39c82dfcb 100644
--- a/packages/core/test/aisdk-native.test.ts
+++ b/packages/core/test/aisdk-native.test.ts
@@ -5,11 +5,75 @@ const map = (packageName: string, settings: Readonly<Record<string, unknown>>, m
   AISDKNative.map({ packageName, settings, modelID })
 
 describe("AISDKNative", () => {
+  test("maps both models.dev Bedrock packages to native providers", () => {
+    expect(map("@ai-sdk/amazon-bedrock", { region: "us-east-1" })).toEqual({
+      package: "@opencode-ai/ai/providers/amazon-bedrock",
+      settings: { region: "us-east-1" },
+    })
+    expect(map("@ai-sdk/amazon-bedrock/mantle", { region: "us-east-1" }, "openai.gpt-oss-120b")).toEqual({
+      package: "@opencode-ai/ai/providers/amazon-bedrock/mantle/responses",
+      settings: { region: "us-east-1" },
+    })
+  })
+
+  test("maps Bedrock provider and request options", () => {
+    expect(
+      map(
+        "@ai-sdk/amazon-bedrock",
+        {
+          region: "us-east-1",
+          topP: 0.8,
+          headers: { "x-test": "value" },
+          additionalModelRequestFields: {
+            existing: true,
+            anthropic_beta: ["existing-beta"],
+            output_config: { format: "text" },
+          },
+          reasoningConfig: { type: "adaptive", display: "summarized", maxReasoningEffort: "high" },
+          anthropicBeta: ["context-1m-2025-08-07"],
+          serviceTier: "priority",
+        },
+        "anthropic.claude-sonnet-4-6-v1",
+      ),
+    ).toEqual({
+      package: "@opencode-ai/ai/providers/amazon-bedrock",
+      settings: { region: "us-east-1", topP: 0.8 },
+      headers: { "x-test": "value" },
+      body: {
+        additionalModelRequestFields: {
+          existing: true,
+          anthropic_beta: ["existing-beta", "context-1m-2025-08-07"],
+          thinking: { type: "adaptive", display: "summarized" },
+          output_config: { format: "text", effort: "high" },
+        },
+        serviceTier: { type: "priority" },
+      },
+    })
+
+    expect(
+      map(
+        "@ai-sdk/amazon-bedrock",
+        { reasoningConfig: { type: "enabled", maxReasoningEffort: "max" } },
+        "amazon.nova-2-lite-v1:0",
+      )?.body,
+    ).toEqual({
+      additionalModelRequestFields: {
+        reasoningConfig: { type: "enabled", maxReasoningEffort: "max" },
+      },
+    })
+
+    expect(
+      map("@ai-sdk/amazon-bedrock", { reasoningConfig: { maxReasoningEffort: "high" } }, "openai.gpt-oss-120b-1:0")
+        ?.body,
+    ).toEqual({ additionalModelRequestFields: { reasoning_effort: "high" } })
+  })
+
   test("maps Bedrock Mantle models to their supported native APIs", () => {
     const settings = {
       bearerToken: "token",
       region: "us-west-2",
       baseURL: "https://mantle.test/v1",
+      headers: { "x-test": "value" },
       reasoningEffort: "high",
       reasoningSummary: "auto",
       include: ["reasoning.encrypted_content"],
@@ -29,6 +93,7 @@ describe("AISDKNative", () => {
           },
         },
       },
+      headers: { "x-test": "value" },
     })
     expect(map("@ai-sdk/amazon-bedrock/mantle", settings, "openai.gpt-oss-safeguard-20b")?.package).toBe(
       "@opencode-ai/ai/providers/amazon-bedrock/mantle/chat",
@@ -68,12 +133,6 @@ describe("AISDKNative", () => {
     })
   })
 
-  test("keeps Bedrock Mantle on the AI SDK when native static auth is unavailable", () => {
-    expect(
-      map("@ai-sdk/amazon-bedrock/mantle", { region: "us-east-1", profile: "production" }, "openai.gpt-oss-120b"),
-    ).toBeUndefined()
-  })
-
   test("maps the legacy Bedrock endpoint override", () => {
     expect(
       map(
diff --git a/packages/core/test/model-resolver.test.ts b/packages/core/test/model-resolver.test.ts
index 98a5b646792..b74a9b799c2 100644
--- a/packages/core/test/model-resolver.test.ts
+++ b/packages/core/test/model-resolver.test.ts
@@ -620,6 +620,18 @@ describe("ModelResolver", () => {
       const xai = yield* ModelResolver.fromCatalogModel(
         model(Provider.aisdk("@ai-sdk/xai"), { settings: { reasoningEffort: "high" } }),
       )
+      const bedrock = yield* ModelResolver.fromCatalogModel(
+        model(Provider.aisdk("@ai-sdk/amazon-bedrock"), {
+          settings: { region: "us-east-1", topP: 0.8, serviceTier: "priority" },
+          body: {},
+        }),
+      )
+      const mantle = yield* ModelResolver.fromCatalogModel(
+        model(Provider.aisdk("@ai-sdk/amazon-bedrock/mantle"), {
+          modelID: "openai.gpt-oss-120b",
+          settings: { region: "us-east-1" },
+        }),
+      )
 
       expect(google.route.id).toBe("gemini")
       expect(google.route.defaults.providerOptions).toEqual({
@@ -631,6 +643,10 @@ describe("ModelResolver", () => {
       expect(xai.route.defaults.providerOptions).toEqual({
         xai: { reasoningEffort: "high", store: false },
       })
+      expect(bedrock.route.id).toBe("bedrock-converse")
+      expect(bedrock.route.defaults.generation).toEqual({ topP: 0.8 })
+      expect(bedrock.route.defaults.http?.body).toEqual({ serviceTier: { type: "priority" } })
+      expect(mantle.route.id).toBe("bedrock-mantle-responses")
     }),
   )