diff --git a/apps/jumpserver/conf.py b/apps/jumpserver/conf.py
index 879d12fc2..d39f62292 100644
--- a/apps/jumpserver/conf.py
+++ b/apps/jumpserver/conf.py
@@ -13,11 +13,11 @@ import json
 import logging
 import os
 import re
+import sys
 import types
 from importlib import import_module
 from urllib.parse import urljoin, urlparse, quote
 
-import sys
 import yaml
 from django.urls import reverse_lazy
 from django.utils.translation import gettext_lazy as _
@@ -699,7 +699,6 @@ class Config(dict):
         'LIMIT_SUPER_PRIV': False,
 
         # Chat AI
-        'IS_CUSTOM_MODEL': False,
         'CHAT_AI_ENABLED': False,
         'CHAT_AI_METHOD': 'api',
         'CHAT_AI_EMBED_URL': '',
diff --git a/apps/jumpserver/settings/custom.py b/apps/jumpserver/settings/custom.py
index dec51af85..a3990ff0d 100644
--- a/apps/jumpserver/settings/custom.py
+++ b/apps/jumpserver/settings/custom.py
@@ -239,7 +239,6 @@ LIMIT_SUPER_PRIV = CONFIG.LIMIT_SUPER_PRIV
 ASSET_SIZE = 'small'
 
 # Chat AI
-IS_CUSTOM_MODEL = CONFIG.IS_CUSTOM_MODEL
 CUSTOM_GPT_MODEL = CONFIG.CUSTOM_GPT_MODEL
 CUSTOM_DEEPSEEK_MODEL = CONFIG.CUSTOM_DEEPSEEK_MODEL
 CHAT_AI_ENABLED = CONFIG.CHAT_AI_ENABLED
diff --git a/apps/settings/api/chat.py b/apps/settings/api/chat.py
index 3b9fadd18..c42fa3f46 100644
--- a/apps/settings/api/chat.py
+++ b/apps/settings/api/chat.py
@@ -42,22 +42,18 @@ class ChatAITestingAPI(GenericAPIView):
             )
 
         tp = config['CHAT_AI_TYPE']
-        is_custom_model = config['IS_CUSTOM_MODEL']
         if tp == ChatAITypeChoices.gpt:
             url = config['GPT_BASE_URL']
             api_key = config['GPT_API_KEY']
             proxy = config['GPT_PROXY']
             model = config['GPT_MODEL']
-            custom_model = config['CUSTOM_GPT_MODEL']
+            model = model if config['GPT_MODEL'] != 'custom' else config['CUSTOM_GPT_MODEL']
         else:
             url = config['DEEPSEEK_BASE_URL']
             api_key = config['DEEPSEEK_API_KEY']
             proxy = config['DEEPSEEK_PROXY']
             model = config['DEEPSEEK_MODEL']
-            custom_model = config['CUSTOM_DEEPSEEK_MODEL']
-
-        model = custom_model or model \
-            if is_custom_model else model
+            model = model if config['DEEPSEEK_MODEL'] != 'custom' else config['CUSTOM_DEEPSEEK_MODEL']
 
         kwargs = {
             'base_url': url or None,
diff --git a/apps/settings/const.py b/apps/settings/const.py
index 7ad3d3b34..dd17fc123 100644
--- a/apps/settings/const.py
+++ b/apps/settings/const.py
@@ -19,6 +19,7 @@ class ChatAITypeChoices(TextChoices):
 
 
 class GPTModelChoices(TextChoices):
+    custom = 'custom', _('Custom gpt model')
     # 🚀 Latest flagship dialogue model
     GPT_5_2 = 'gpt-5.2', 'gpt-5.2'
     GPT_5_2_PRO = 'gpt-5.2-pro', 'gpt-5.2-pro'
@@ -39,5 +40,6 @@ class GPTModelChoices(TextChoices):
 
 
 class DeepSeekModelChoices(TextChoices):
+    custom = 'custom', _('Custom DeepSeek model')
     deepseek_chat = 'deepseek-chat', 'DeepSeek-V3'
     deepseek_reasoner = 'deepseek-reasoner', 'DeepSeek-R1'
diff --git a/apps/settings/models.py b/apps/settings/models.py
index c461680cb..a30db92f2 100644
--- a/apps/settings/models.py
+++ b/apps/settings/models.py
@@ -201,18 +201,14 @@ def get_chatai_data():
         'url': settings.GPT_BASE_URL,
         'api_key': settings.GPT_API_KEY,
         'proxy': settings.GPT_PROXY,
-        'model': settings.GPT_MODEL,
+        'model': settings.GPT_MODEL if settings.GPT_MODEL != 'custom' else settings.CUSTOM_GPT_MODEL,
     }
-    custom_model = settings.CUSTOM_GPT_MODEL
     if settings.CHAT_AI_TYPE != ChatAITypeChoices.gpt:
         data['url'] = settings.DEEPSEEK_BASE_URL
         data['api_key'] = settings.DEEPSEEK_API_KEY
         data['proxy'] = settings.DEEPSEEK_PROXY
-        data['model'] = settings.DEEPSEEK_MODEL
-        custom_model = settings.CUSTOM_DEEPSEEK_MODEL
+        data['model'] = settings.DEEPSEEK_MODEL if settings.DEEPSEEK_MODEL != 'custom' else settings.CUSTOM_DEEPSEEK_MODEL
 
-    data['model'] = custom_model or data['model'] \
-        if settings.IS_CUSTOM_MODEL else data['model']
     return data
 
 
diff --git a/apps/settings/serializers/feature.py b/apps/settings/serializers/feature.py
index 249acc1e9..f1253af17 100644
--- a/apps/settings/serializers/feature.py
+++ b/apps/settings/serializers/feature.py
@@ -168,10 +168,6 @@ class ChatAISettingSerializer(serializers.Serializer):
         default=DeepSeekModelChoices.deepseek_chat, choices=DeepSeekModelChoices.choices,
         label=_("DeepSeek Model"), required=False,
     )
-    IS_CUSTOM_MODEL = serializers.BooleanField(
-        required=False, default=False, label=_("Custom Model"),
-        help_text=_("Whether to use a custom model")
-    )
     CUSTOM_GPT_MODEL = serializers.CharField(
         max_length=256, allow_blank=True,
         required=False, label=_('Custom gpt model'),