diff --git a/packages/core/src/core/openaiContentGenerator/pipeline.test.ts b/packages/core/src/core/openaiContentGenerator/pipeline.test.ts
index d3e8b03276..5c699a45e2 100644
--- a/packages/core/src/core/openaiContentGenerator/pipeline.test.ts
+++ b/packages/core/src/core/openaiContentGenerator/pipeline.test.ts
@@ -722,6 +722,28 @@ describe('ContentGenerationPipeline', () => {
         expectedThinking: true,
         expectedToolChoice: undefined,
       },
+      {
+        name: 'remove required tool selection when thinking is enabled on the wire',
+        baseUrl: 'https://dashscope.aliyuncs.com/compatible-mode/v1',
+        model: 'qwen3.7-max',
+        extraBody: { enable_thinking: true },
+        thinkingMandatory: undefined,
+        reasoning: undefined,
+        includeThoughts: true,
+        expectedThinking: true,
+        expectedToolChoice: undefined,
+      },
+      {
+        name: 'preserve required tool selection when thinking is not enabled',
+        baseUrl: 'https://dashscope.aliyuncs.com/compatible-mode/v1',
+        model: 'qwen3.7-max',
+        extraBody: undefined,
+        thinkingMandatory: undefined,
+        reasoning: undefined,
+        includeThoughts: true,
+        expectedThinking: undefined,
+        expectedToolChoice: 'required',
+      },
       {
         name: 'never emit the disable even under the reasoning opt-out',
         baseUrl:
diff --git a/packages/core/src/core/openaiContentGenerator/pipeline.ts b/packages/core/src/core/openaiContentGenerator/pipeline.ts
index 04b9837a43..1614f5fcbf 100644
--- a/packages/core/src/core/openaiContentGenerator/pipeline.ts
+++ b/packages/core/src/core/openaiContentGenerator/pipeline.ts
@@ -955,10 +955,16 @@ export class ContentGenerationPipeline {
           delete typed['chat_template_kwargs'];
         }
       }
-      // DashScope rejects forced tool selection while thinking is enabled.
-      if (isDashScope && typed['tool_choice'] === 'required') {
-        delete typed['tool_choice'];
-      }
+    }
+
+    const typed = providerRequest as unknown as Record<string, unknown>;
+    // DashScope rejects forced tool selection while thinking is enabled.
+    if (
+      isDashScope &&
+      typed['tool_choice'] === 'required' &&
+      (thinkingMandatory || typed['enable_thinking'] === true)
+    ) {
+      delete typed['tool_choice'];
     }
 
     return providerRequest;