diff --git a/packages/core/src/aisdk-native.ts b/packages/core/src/aisdk-native.ts
index f29122d9951..72b8d383e3d 100644
--- a/packages/core/src/aisdk-native.ts
+++ b/packages/core/src/aisdk-native.ts
@@ -209,7 +209,7 @@ function mapBedrockRequest(input: MapInput): Pick<Mapping, "headers" | "body"> {
   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 openai = input.modelID.includes("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
diff --git a/packages/core/test/aisdk-native.test.ts b/packages/core/test/aisdk-native.test.ts
index 1f6caccbd63..4a9ff46ef0c 100644
--- a/packages/core/test/aisdk-native.test.ts
+++ b/packages/core/test/aisdk-native.test.ts
@@ -251,10 +251,11 @@ describe("AISDKNative", () => {
       },
     })
 
-    expect(
-      map("@ai-sdk/amazon-bedrock", { reasoningConfig: { maxReasoningEffort: "high" } }, "openai.gpt-oss-120b-1:0")
-        ?.body,
-    ).toEqual({ additionalModelRequestFields: { reasoning_effort: "high" } })
+    for (const modelID of ["openai.gpt-oss-120b-1:0", "global.openai.gpt-5.6-sol", "us.openai.gpt-5.6-sol"]) {
+      expect(
+        map("@ai-sdk/amazon-bedrock", { reasoningConfig: { maxReasoningEffort: "high" } }, modelID)?.body,
+      ).toEqual({ additionalModelRequestFields: { reasoning_effort: "high" } })
+    }
   })
 
   test("maps Bedrock Mantle models to their supported native APIs", () => {