diff --git a/apps/assets/const/protocol.py b/apps/assets/const/protocol.py
index 4d5c2f097..0a44eed2c 100644
--- a/apps/assets/const/protocol.py
+++ b/apps/assets/const/protocol.py
@@ -295,23 +295,17 @@ class Protocol(ChoicesMixin, models.TextChoices):
                 'setting': {
                     'api_mode': {
                         'type': 'choice',
-                        'default': 'gpt-3.5-turbo',
+                        'default': 'gpt-4o-mini',
                         'label': _('API mode'),
                         'choices': [
-                            ('gpt-3.5-turbo', 'GPT-3.5 Turbo'),
-                            ('gpt-3.5-turbo-1106', 'GPT-3.5 Turbo 1106'),
+                            ('gpt-4o-mini', 'GPT-4o-mini'),
+                            ('gpt-4o', 'GPT-4o'),
+                            ('gpt-4-turbo', 'GPT-4 Turbo'),
                         ]
                     }
                 }
             }
         }
-        if settings.XPACK_LICENSE_IS_VALID:
-            choices = protocols[cls.chatgpt]['setting']['api_mode']['choices']
-            choices.extend([
-                ('gpt-4', 'GPT-4'),
-                ('gpt-4-turbo', 'GPT-4 Turbo'),
-                ('gpt-4o', 'GPT-4o'),
-            ])
         return protocols
 
     @classmethod
diff --git a/apps/settings/serializers/feature.py b/apps/settings/serializers/feature.py
index 708e8179c..c27f90629 100644
--- a/apps/settings/serializers/feature.py
+++ b/apps/settings/serializers/feature.py
@@ -69,7 +69,9 @@ class VaultSettingSerializer(serializers.Serializer):
 
 class ChatAISettingSerializer(serializers.Serializer):
     PREFIX_TITLE = _('Chat AI')
-    GPT_MODEL_CHOICES = []
+    API_MODEL = Protocol.gpt_protocols()[Protocol.chatgpt]['setting']['api_mode']
+    GPT_MODEL_CHOICES = API_MODEL['choices']
+    GPT_MODEL_DEFAULT = API_MODEL['default']
 
     CHAT_AI_ENABLED = serializers.BooleanField(
         required=False, label=_('Enable Chat AI')
@@ -84,26 +86,9 @@ class ChatAISettingSerializer(serializers.Serializer):
         allow_blank=True, required=False, label=_('Proxy')
     )
     GPT_MODEL = serializers.ChoiceField(
-        default='', choices=GPT_MODEL_CHOICES, label=_("GPT Model"), required=False,
+        default=GPT_MODEL_DEFAULT, choices=GPT_MODEL_CHOICES, label=_("GPT Model"), required=False,
     )
 
-    def __init__(self, *args, **kwargs):
-        super().__init__(*args, **kwargs)
-        self.set_GPT_MODEL_choices()
-
-    def set_GPT_MODEL_choices(self):
-        field_gpt_model = self.fields.get("GPT_MODEL")
-        if not field_gpt_model:
-            return
-        gpt_api_model = Protocol.gpt_protocols()[Protocol.chatgpt]['setting']['api_mode']
-        choices = gpt_api_model['choices']
-        field_gpt_model.choices = choices
-        field_gpt_model.default = gpt_api_model['default']
-        cls = self.__class__
-        if cls.GPT_MODEL_CHOICES:
-            return
-        cls.GPT_MODEL_CHOICES.extend(choices)
-
 
 class TicketSettingSerializer(serializers.Serializer):
     PREFIX_TITLE = _('Ticket')