diff --git a/metagpt/provider/openai_api.py b/metagpt/provider/openai_api.py
index b2a0faca5..844cd4c1c 100644
--- a/metagpt/provider/openai_api.py
+++ b/metagpt/provider/openai_api.py
@@ -77,21 +77,12 @@ class OpenAIGPTAPI(BaseGPTAPI, RateLimiter):
     """
 
     def __init__(self):
-        self.__init_openai(CONFIG)
         self.llm = openai
         self.model = CONFIG.openai_api_model
         self.auto_max_tokens = False
+        self.rpm = int(CONFIG.get("RPM", 10))
         RateLimiter.__init__(self, rpm=self.rpm)
 
-    def __init_openai(self, config):
-        openai.api_key = config.openai_api_key
-        if config.openai_api_base:
-            openai.api_base = config.openai_api_base
-        if config.openai_api_type:
-            openai.api_type = config.openai_api_type
-            openai.api_version = config.openai_api_version
-        self.rpm = int(config.get("RPM", 10))
-
     async def _achat_completion_stream(self, messages: list[dict]) -> str:
         response = await self.async_retry_call(
             openai.ChatCompletion.acreate, **self._cons_kwargs(messages), stream=True
@@ -133,6 +124,10 @@ class OpenAIGPTAPI(BaseGPTAPI, RateLimiter):
                 "temperature": 0.3,
             }
         kwargs["timeout"] = 3
+        kwargs["api_base"] = CONFIG.openai_api_base
+        kwargs["api_key"] = CONFIG.openai_api_key
+        kwargs["api_type"] = CONFIG.openai_api_type
+        kwargs["api_version"] = CONFIG.openai_api_version
         return kwargs
 
     async def _achat_completion(self, messages: list[dict]) -> dict: