diff --git a/apps/application/serializers/application_serializers.py b/apps/application/serializers/application_serializers.py
index d8215e983..eecfc6a0f 100644
--- a/apps/application/serializers/application_serializers.py
+++ b/apps/application/serializers/application_serializers.py
@@ -96,7 +96,7 @@ class NoReferencesSetting(serializers.Serializer):
 
 
 def valid_model_params_setting(model_id, model_params_setting):
-    if model_id is None:
+    if model_id is None or model_params_setting is None or len(model_params_setting.keys()) == 0:
         return
     model = QuerySet(Model).filter(id=model_id).first()
     credential = get_model_credential(model.provider, model.model_type, model.model_name)
@@ -416,7 +416,7 @@ class ApplicationSerializer(serializers.Serializer):
                                model_setting=application.get('model_setting'),
                                problem_optimization=application.get('problem_optimization'),
                                type=ApplicationTypeChoices.SIMPLE,
-                               model_params_setting=application.get('model_params_setting',{}),
+                               model_params_setting=application.get('model_params_setting', {}),
                                work_flow={}
                                )
 
@@ -697,7 +697,9 @@ class ApplicationSerializer(serializers.Serializer):
                 ApplicationSerializer.Edit(data=instance).is_valid(
                     raise_exception=True)
             application_id = self.data.get("application_id")
-            valid_model_params_setting(instance.get('model_id'), instance.get('model_params_setting'))
+            valid_model_params_setting(instance.get('model_id'),
+                                       instance.get('model_params_setting'))
+
             application = QuerySet(Application).get(id=application_id)
             if instance.get('model_id') is None or len(instance.get('model_id')) == 0:
                 application.model_id = None
diff --git a/apps/setting/models_provider/impl/openai_model_provider/model/llm.py b/apps/setting/models_provider/impl/openai_model_provider/model/llm.py
index 40f90fa0a..ce9d624c2 100644
--- a/apps/setting/models_provider/impl/openai_model_provider/model/llm.py
+++ b/apps/setting/models_provider/impl/openai_model_provider/model/llm.py
@@ -43,3 +43,17 @@ class OpenAIChatModel(MaxKBBaseModel, ChatOpenAI):
             custom_get_token_ids=custom_get_token_ids
         )
         return azure_chat_open_ai
+
+    def get_num_tokens_from_messages(self, messages: List[BaseMessage]) -> int:
+        try:
+            super().get_num_tokens_from_messages(messages)
+        except Exception as e:
+            tokenizer = TokenizerManage.get_tokenizer()
+            return sum([len(tokenizer.encode(get_buffer_string([m]))) for m in messages])
+
+    def get_num_tokens(self, text: str) -> int:
+        try:
+            super().get_num_tokens(text)
+        except Exception as e:
+            tokenizer = TokenizerManage.get_tokenizer()
+            return len(tokenizer.encode(text))