diff --git a/src/costrict/provider/index.ts b/src/costrict/provider/index.ts
index 69faf495b..1da455fdf 100644
--- a/src/costrict/provider/index.ts
+++ b/src/costrict/provider/index.ts
@@ -81,7 +81,7 @@ export async function* queryModelCoStrict(
     )
 
     // 5. 转换为 OpenAI 格式
-    const openaiMessages = anthropicMessagesToOpenAI(messagesForAPI, systemPrompt)
+    const openaiMessages = anthropicMessagesToOpenAI(messagesForAPI, systemPrompt, { enableThinking: true })
     const openaiTools = anthropicToolsToOpenAI(standardTools)
     const openaiToolChoice = anthropicToolChoiceToOpenAI(options.toolChoice)