diff --git a/camel/model_backend.py b/camel/model_backend.py
index d54eea4..496120b 100644
--- a/camel/model_backend.py
+++ b/camel/model_backend.py
@@ -67,9 +67,12 @@ class OpenAIModel(ModelBackend):
         num_max_token = num_max_token_map[self.model_type.value]
         num_max_completion_tokens = num_max_token - num_prompt_tokens
         self.model_config_dict['max_tokens'] = num_max_completion_tokens
-        response = openai.ChatCompletion.create(*args, **kwargs,
-                                                model=self.model_type.value,
-                                                **self.model_config_dict)
+
+        try:
+            response = openai.ChatCompletion.create(*args, **kwargs, model=self.model_type.value, **self.model_config_dict)
+        except AttributeError:
+            response = openai.chat.completions.create(*args, **kwargs, model=self.model_type.value, **self.model_config_dict)
+
         cost = prompt_cost(
                 self.model_type.value, 
                 num_prompt_tokens=response["usage"]["prompt_tokens"],