diff --git a/config/config.yaml b/config/config.yaml
index 355413d1f..ceab18854 100644
--- a/config/config.yaml
+++ b/config/config.yaml
@@ -61,4 +61,8 @@ SD_T2I_API: "/sdapi/v1/txt2img"
 #### for Mermaid CLI
 ## If you installed mmdc (Mermaid CLI) only for metagpt then enable the following configuration.
 #PUPPETEER_CONFIG: "./config/puppeteer-config.json"
-#MMDC: "./node_modules/.bin/mmdc"
\ No newline at end of file
+#MMDC: "./node_modules/.bin/mmdc"
+
+### for update_costs & calc_usage
+UPDATE_COSTS: false
+CALC_USAGE: false
\ No newline at end of file
diff --git a/metagpt/config.py b/metagpt/config.py
index 0f8ed37d6..d53571468 100644
--- a/metagpt/config.py
+++ b/metagpt/config.py
@@ -79,6 +79,10 @@ 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)
+
+        
 
     def _init_with_config_files_and_env(self, configs: dict, yaml_file):
         """从config/key.yaml / config/config.yaml / env三处按优先级递减加载"""
diff --git a/metagpt/provider/openai_api.py b/metagpt/provider/openai_api.py
index f6499c643..fe9532d43 100644
--- a/metagpt/provider/openai_api.py
+++ b/metagpt/provider/openai_api.py
@@ -221,10 +221,11 @@ class OpenAIGPTAPI(BaseGPTAPI, RateLimiter):
 
     def _calc_usage(self, messages: list[dict], rsp: str) -> dict:
         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
+        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
 
     async def acompletion_batch(self, batch: list[list[dict]]) -> list[dict]:
@@ -254,9 +255,10 @@ class OpenAIGPTAPI(BaseGPTAPI, RateLimiter):
         return results
 
     def _update_costs(self, usage: dict):
-        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.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)
 
     def get_costs(self) -> Costs:
         return self._cost_manager.get_costs()