diff --git a/config/config.yaml b/config/config.yaml
index ceab18854..b5d1e60d5 100644
--- a/config/config.yaml
+++ b/config/config.yaml
@@ -63,6 +63,5 @@ SD_T2I_API: "/sdapi/v1/txt2img"
 #PUPPETEER_CONFIG: "./config/puppeteer-config.json"
 #MMDC: "./node_modules/.bin/mmdc"
 
-### for update_costs & calc_usage
-UPDATE_COSTS: false
-CALC_USAGE: false
\ No newline at end of file
+### for calc_usage
+# CALC_USAGE: false
\ No newline at end of file
diff --git a/metagpt/config.py b/metagpt/config.py
index d53571468..3621002eb 100644
--- a/metagpt/config.py
+++ b/metagpt/config.py
@@ -79,7 +79,6 @@ class Config(metaclass=Singleton):
         self.total_cost = 0.0
         self.puppeteer_config = self._get("PUPPETEER_CONFIG","")
         self.mmdc = self._get("MMDC","mmdc")
-        self.update_costs = self._get("UPDATE_COSTS",True)
         self.calc_usage = self._get("CALC_USAGE",True)
 
         
diff --git a/metagpt/provider/openai_api.py b/metagpt/provider/openai_api.py
index fe9532d43..5847a4001 100644
--- a/metagpt/provider/openai_api.py
+++ b/metagpt/provider/openai_api.py
@@ -220,13 +220,18 @@ class OpenAIGPTAPI(BaseGPTAPI, RateLimiter):
         return self.get_choice_text(rsp)
 
     def _calc_usage(self, messages: list[dict], rsp: str) -> dict:
-        usage = {}
         if CONFIG.calc_usage:
-            prompt_tokens = count_message_tokens(messages, self.model)
-            completion_tokens = count_string_tokens(rsp, self.model)
-            usage['prompt_tokens'] = prompt_tokens
-            usage['completion_tokens'] = completion_tokens
-        return usage
+            usage = {}
+            try:
+                prompt_tokens = count_message_tokens(messages, self.model)
+                completion_tokens = count_string_tokens(rsp, self.model)
+                usage['prompt_tokens'] = prompt_tokens
+                usage['completion_tokens'] = completion_tokens
+                return usage
+            except Exception as e:
+                logger.error("usage calculation failed!", e)
+                CONFIG.calc_usage = False
+                pass
 
     async def acompletion_batch(self, batch: list[list[dict]]) -> list[dict]:
         """返回完整JSON"""
@@ -255,10 +260,15 @@ class OpenAIGPTAPI(BaseGPTAPI, RateLimiter):
         return results
 
     def _update_costs(self, usage: dict):
-        if CONFIG.update_costs:
-            prompt_tokens = int(usage['prompt_tokens'])
-            completion_tokens = int(usage['completion_tokens'])
-            self._cost_manager.update_cost(prompt_tokens, completion_tokens, self.model)
+        if CONFIG.calc_usage:
+            try:
+                prompt_tokens = int(usage['prompt_tokens'])
+                completion_tokens = int(usage['completion_tokens'])
+                self._cost_manager.update_cost(prompt_tokens, completion_tokens, self.model)
+            except Exception as e:
+                logger.error("updating costs failed!", e)
+                CONFIG.calc_usage = False
+                pass
 
     def get_costs(self) -> Costs:
         return self._cost_manager.get_costs()