diff --git a/metagpt/provider/openai_api.py b/metagpt/provider/openai_api.py
index 7b2cd6220..fe41fb05f 100644
--- a/metagpt/provider/openai_api.py
+++ b/metagpt/provider/openai_api.py
@@ -236,7 +236,7 @@ class OpenAILLM(BaseLLM):
             usage.prompt_tokens = count_message_tokens(messages, self.model)
             usage.completion_tokens = count_string_tokens(rsp, self.model)
         except Exception as e:
-            logger.error(f"usage calculation failed: {e}")
+            logger.warning(f"usage calculation failed: {e}")
 
         return usage
 
@@ -255,7 +255,7 @@ class OpenAILLM(BaseLLM):
             return self.config.max_token
         # FIXME
         # https://community.openai.com/t/why-is-gpt-3-5-turbo-1106-max-tokens-limited-to-4096/494973/3
-        return min(get_max_completion_tokens(messages, self.model, self.config.max_tokens), 4096)
+        return min(get_max_completion_tokens(messages, self.model, self.config.max_token), 4096)
 
     @handle_exception
     async def amoderation(self, content: Union[str, list[str]]):