diff --git a/maubot_llmplus/thrid_platform.py b/maubot_llmplus/thrid_platform.py
index 3edd9db..889c5fc 100644
--- a/maubot_llmplus/thrid_platform.py
+++ b/maubot_llmplus/thrid_platform.py
@@ -144,7 +144,7 @@ class XAi(Platform):
         }
 
         if 'max_tokens' in self.config and self.max_tokens:
-            data["max_tokens"] = self.max_tokens
+            request_body["max_tokens"] = self.max_tokens
 
         if 'temperature' in self.config and self.temperature:
             request_body["temperature"] = self.temperature