diff --git a/src/app/api/settings/route.ts b/src/app/api/settings/route.ts
index 6fa0000..675621c 100644
--- a/src/app/api/settings/route.ts
+++ b/src/app/api/settings/route.ts
@@ -9,7 +9,8 @@ import { encryptApiKey } from '@/lib/crypto';
 const DEFAULT_SETTINGS = {
   cchUrl: process.env.CCH_DEFAULT_URL || 'https://claude.leocoder.cn/',
   cchApiKeyConfigured: false,
-  defaultModel: 'claude-sonnet-4-20250514',
+  apiFormat: 'claude' as 'claude' | 'openai', // API 格式：claude（原生）| openai（兼容）
+  defaultModel: 'claude-sonnet-4-5-20250929',
   defaultTools: ['web_search', 'code_execution', 'web_fetch'],
   systemPrompt: '',
   temperature: '0.7',
@@ -29,6 +30,7 @@ function formatSettingsResponse(settings: typeof userSettings.$inferSelect | nul
   return {
     cchUrl: settings.cchUrl || DEFAULT_SETTINGS.cchUrl,
     cchApiKeyConfigured: settings.cchApiKeyConfigured || false,
+    apiFormat: (settings.apiFormat as 'claude' | 'openai') || DEFAULT_SETTINGS.apiFormat,
     defaultModel: settings.defaultModel || DEFAULT_SETTINGS.defaultModel,
     defaultTools: settings.defaultTools || DEFAULT_SETTINGS.defaultTools,
     systemPrompt: settings.systemPrompt || '',
@@ -102,6 +104,7 @@ export async function PUT(request: Request) {
     const {
       cchUrl,
       cchApiKey,
+      apiFormat,
       defaultModel,
       defaultTools,
       systemPrompt,
@@ -135,6 +138,11 @@ export async function PUT(request: Request) {
       }
     }
 
+    // API 格式类型
+    if (apiFormat !== undefined) {
+      updateData.apiFormat = apiFormat;
+    }
+
     if (defaultModel !== undefined) {
       updateData.defaultModel = defaultModel;
     }
diff --git a/src/app/settings/page.tsx b/src/app/settings/page.tsx
index 61eb91b..9e7344c 100644
--- a/src/app/settings/page.tsx
+++ b/src/app/settings/page.tsx
@@ -52,6 +52,7 @@ export default function SettingsPage() {
   // CCH 配置状态
   const [cchUrl, setCchUrl] = useState('');
   const [cchApiKey, setCchApiKey] = useState('');
+  const [apiFormat, setApiFormat] = useState<'claude' | 'openai'>('claude');
   const [showApiKey, setShowApiKey] = useState(false);
   const [saveStatus, setSaveStatus] = useState<'idle' | 'saving' | 'saved' | 'error'>('idle');
 
@@ -70,6 +71,7 @@ export default function SettingsPage() {
   useEffect(() => {
     if (settings) {
       setCchUrl(settings.cchUrl || '');
+      setApiFormat((settings.apiFormat as 'claude' | 'openai') || 'claude');
       setSystemPrompt(settings.systemPrompt || '');
       setTemperature(settings.temperature || '0.7');
     }
@@ -82,6 +84,7 @@ export default function SettingsPage() {
       const updates: Record<string, string> = {};
       if (cchUrl) updates.cchUrl = cchUrl;
       if (cchApiKey) updates.cchApiKey = cchApiKey;
+      updates.apiFormat = apiFormat;
 
       if (Object.keys(updates).length > 0) {
         await updateSettings(updates);
@@ -333,6 +336,83 @@ export default function SettingsPage() {
                 />
               </SettingsItem>
 
+              {/* API 格式选择 */}
+              <div className="px-5 py-4 border-b border-[var(--color-border-light)]">
+                <div className="text-sm font-medium text-[var(--color-text-primary)] mb-1">
+                  API 格式
+                </div>
+                <div className="text-xs text-[var(--color-text-tertiary)] mb-4">
+                  选择中转站的 API 接口格式
+                </div>
+                <div className="flex gap-3">
+                  {/* Claude 原生选项 */}
+                  <button
+                    type="button"
+                    onClick={() => setApiFormat('claude')}
+                    className={cn(
+                      'flex-1 p-4 rounded-lg border-2 text-left transition-all',
+                      apiFormat === 'claude'
+                        ? 'border-[var(--color-primary)] bg-[var(--color-primary)]/5'
+                        : 'border-[var(--color-border)] hover:border-[var(--color-border-dark)] bg-[var(--color-bg-primary)]'
+                    )}
+                  >
+                    <div className="flex items-center gap-2 mb-1">
+                      <div className={cn(
+                        'w-4 h-4 rounded-full border-2 flex items-center justify-center',
+                        apiFormat === 'claude'
+                          ? 'border-[var(--color-primary)]'
+                          : 'border-[var(--color-border)]'
+                      )}>
+                        {apiFormat === 'claude' && (
+                          <div className="w-2 h-2 rounded-full bg-[var(--color-primary)]" />
+                        )}
+                      </div>
+                      <span className={cn(
+                        'font-medium',
+                        apiFormat === 'claude'
+                          ? 'text-[var(--color-primary)]'
+                          : 'text-[var(--color-text-primary)]'
+                      )}>
+                        Claude 原生
+                      </span>
+                    </div>
+                  </button>
+
+                  {/* OpenAI 兼容选项 */}
+                  <button
+                    type="button"
+                    onClick={() => setApiFormat('openai')}
+                    className={cn(
+                      'flex-1 p-4 rounded-lg border-2 text-left transition-all',
+                      apiFormat === 'openai'
+                        ? 'border-[var(--color-primary)] bg-[var(--color-primary)]/5'
+                        : 'border-[var(--color-border)] hover:border-[var(--color-border-dark)] bg-[var(--color-bg-primary)]'
+                    )}
+                  >
+                    <div className="flex items-center gap-2 mb-1">
+                      <div className={cn(
+                        'w-4 h-4 rounded-full border-2 flex items-center justify-center',
+                        apiFormat === 'openai'
+                          ? 'border-[var(--color-primary)]'
+                          : 'border-[var(--color-border)]'
+                      )}>
+                        {apiFormat === 'openai' && (
+                          <div className="w-2 h-2 rounded-full bg-[var(--color-primary)]" />
+                        )}
+                      </div>
+                      <span className={cn(
+                        'font-medium',
+                        apiFormat === 'openai'
+                          ? 'text-[var(--color-primary)]'
+                          : 'text-[var(--color-text-primary)]'
+                      )}>
+                        OpenAI 兼容
+                      </span>
+                    </div>
+                  </button>
+                </div>
+              </div>
+
               <SettingsItem
                 label="API Key"
                 description={
diff --git a/src/drizzle/migrations/0008_flat_star_brand.sql b/src/drizzle/migrations/0008_flat_star_brand.sql
new file mode 100644
index 0000000..f869d3b
--- /dev/null
+++ b/src/drizzle/migrations/0008_flat_star_brand.sql
@@ -0,0 +1 @@
+ALTER TABLE "user_settings" ADD COLUMN "api_format" varchar(20) DEFAULT 'claude';
\ No newline at end of file
diff --git a/src/drizzle/migrations/meta/0008_snapshot.json b/src/drizzle/migrations/meta/0008_snapshot.json
new file mode 100644
index 0000000..56b3121
--- /dev/null
+++ b/src/drizzle/migrations/meta/0008_snapshot.json
@@ -0,0 +1,1128 @@
+{
+  "id": "681144da-c95d-4ad1-8b08-a3028dfe15ef",
+  "prevId": "4c30a42c-4eff-49e1-b4d4-2952d5c9c3b2",
+  "version": "7",
+  "dialect": "postgresql",
+  "tables": {
+    "public.assistant_categories": {
+      "name": "assistant_categories",
+      "schema": "",
+      "columns": {
+        "id": {
+          "name": "id",
+          "type": "serial",
+          "primaryKey": true,
+          "notNull": true
+        },
+        "name": {
+          "name": "name",
+          "type": "varchar(50)",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "icon": {
+          "name": "icon",
+          "type": "varchar(50)",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "description": {
+          "name": "description",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "sort_order": {
+          "name": "sort_order",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": false,
+          "default": 0
+        },
+        "is_enabled": {
+          "name": "is_enabled",
+          "type": "boolean",
+          "primaryKey": false,
+          "notNull": false,
+          "default": true
+        },
+        "created_at": {
+          "name": "created_at",
+          "type": "timestamp with time zone",
+          "primaryKey": false,
+          "notNull": false,
+          "default": "now()"
+        },
+        "updated_at": {
+          "name": "updated_at",
+          "type": "timestamp with time zone",
+          "primaryKey": false,
+          "notNull": false,
+          "default": "now()"
+        }
+      },
+      "indexes": {},
+      "foreignKeys": {},
+      "compositePrimaryKeys": {},
+      "uniqueConstraints": {},
+      "policies": {},
+      "checkConstraints": {},
+      "isRLSEnabled": false
+    },
+    "public.assistants": {
+      "name": "assistants",
+      "schema": "",
+      "columns": {
+        "id": {
+          "name": "id",
+          "type": "serial",
+          "primaryKey": true,
+          "notNull": true
+        },
+        "category_id": {
+          "name": "category_id",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "user_id": {
+          "name": "user_id",
+          "type": "varchar(64)",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "name": {
+          "name": "name",
+          "type": "varchar(100)",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "description": {
+          "name": "description",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "icon": {
+          "name": "icon",
+          "type": "varchar(100)",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "system_prompt": {
+          "name": "system_prompt",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "tags": {
+          "name": "tags",
+          "type": "jsonb",
+          "primaryKey": false,
+          "notNull": false,
+          "default": "'[]'::jsonb"
+        },
+        "is_builtin": {
+          "name": "is_builtin",
+          "type": "boolean",
+          "primaryKey": false,
+          "notNull": false,
+          "default": false
+        },
+        "is_enabled": {
+          "name": "is_enabled",
+          "type": "boolean",
+          "primaryKey": false,
+          "notNull": false,
+          "default": true
+        },
+        "sort_order": {
+          "name": "sort_order",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": false,
+          "default": 0
+        },
+        "use_count": {
+          "name": "use_count",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": false,
+          "default": 0
+        },
+        "created_at": {
+          "name": "created_at",
+          "type": "timestamp with time zone",
+          "primaryKey": false,
+          "notNull": false,
+          "default": "now()"
+        },
+        "updated_at": {
+          "name": "updated_at",
+          "type": "timestamp with time zone",
+          "primaryKey": false,
+          "notNull": false,
+          "default": "now()"
+        }
+      },
+      "indexes": {},
+      "foreignKeys": {},
+      "compositePrimaryKeys": {},
+      "uniqueConstraints": {},
+      "policies": {},
+      "checkConstraints": {},
+      "isRLSEnabled": false
+    },
+    "public.conversations": {
+      "name": "conversations",
+      "schema": "",
+      "columns": {
+        "id": {
+          "name": "id",
+          "type": "serial",
+          "primaryKey": true,
+          "notNull": true
+        },
+        "conversation_id": {
+          "name": "conversation_id",
+          "type": "varchar(64)",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "user_id": {
+          "name": "user_id",
+          "type": "varchar(64)",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "assistant_id": {
+          "name": "assistant_id",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "title": {
+          "name": "title",
+          "type": "varchar(255)",
+          "primaryKey": false,
+          "notNull": true,
+          "default": "'新对话'"
+        },
+        "summary": {
+          "name": "summary",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "model": {
+          "name": "model",
+          "type": "varchar(64)",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "tools": {
+          "name": "tools",
+          "type": "jsonb",
+          "primaryKey": false,
+          "notNull": false,
+          "default": "'[]'::jsonb"
+        },
+        "enable_thinking": {
+          "name": "enable_thinking",
+          "type": "boolean",
+          "primaryKey": false,
+          "notNull": false,
+          "default": false
+        },
+        "system_prompt": {
+          "name": "system_prompt",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "temperature": {
+          "name": "temperature",
+          "type": "varchar(10)",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "message_count": {
+          "name": "message_count",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": false,
+          "default": 0
+        },
+        "total_tokens": {
+          "name": "total_tokens",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": false,
+          "default": 0
+        },
+        "is_archived": {
+          "name": "is_archived",
+          "type": "boolean",
+          "primaryKey": false,
+          "notNull": false,
+          "default": false
+        },
+        "is_pinned": {
+          "name": "is_pinned",
+          "type": "boolean",
+          "primaryKey": false,
+          "notNull": false,
+          "default": false
+        },
+        "created_at": {
+          "name": "created_at",
+          "type": "timestamp with time zone",
+          "primaryKey": false,
+          "notNull": false,
+          "default": "now()"
+        },
+        "updated_at": {
+          "name": "updated_at",
+          "type": "timestamp with time zone",
+          "primaryKey": false,
+          "notNull": false,
+          "default": "now()"
+        },
+        "last_message_at": {
+          "name": "last_message_at",
+          "type": "timestamp with time zone",
+          "primaryKey": false,
+          "notNull": false,
+          "default": "now()"
+        }
+      },
+      "indexes": {},
+      "foreignKeys": {},
+      "compositePrimaryKeys": {},
+      "uniqueConstraints": {
+        "conversations_conversation_id_unique": {
+          "name": "conversations_conversation_id_unique",
+          "nullsNotDistinct": false,
+          "columns": [
+            "conversation_id"
+          ]
+        }
+      },
+      "policies": {},
+      "checkConstraints": {},
+      "isRLSEnabled": false
+    },
+    "public.messages": {
+      "name": "messages",
+      "schema": "",
+      "columns": {
+        "id": {
+          "name": "id",
+          "type": "serial",
+          "primaryKey": true,
+          "notNull": true
+        },
+        "message_id": {
+          "name": "message_id",
+          "type": "varchar(64)",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "conversation_id": {
+          "name": "conversation_id",
+          "type": "varchar(64)",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "role": {
+          "name": "role",
+          "type": "varchar(20)",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "content": {
+          "name": "content",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "thinking_content": {
+          "name": "thinking_content",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "thinking_collapsed": {
+          "name": "thinking_collapsed",
+          "type": "boolean",
+          "primaryKey": false,
+          "notNull": false,
+          "default": true
+        },
+        "tool_calls": {
+          "name": "tool_calls",
+          "type": "jsonb",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "tool_results": {
+          "name": "tool_results",
+          "type": "jsonb",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "images": {
+          "name": "images",
+          "type": "jsonb",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "uploaded_images": {
+          "name": "uploaded_images",
+          "type": "jsonb",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "uploaded_documents": {
+          "name": "uploaded_documents",
+          "type": "jsonb",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "input_tokens": {
+          "name": "input_tokens",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": false,
+          "default": 0
+        },
+        "output_tokens": {
+          "name": "output_tokens",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": false,
+          "default": 0
+        },
+        "status": {
+          "name": "status",
+          "type": "varchar(20)",
+          "primaryKey": false,
+          "notNull": false,
+          "default": "'completed'"
+        },
+        "error_message": {
+          "name": "error_message",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "feedback": {
+          "name": "feedback",
+          "type": "varchar(10)",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "created_at": {
+          "name": "created_at",
+          "type": "timestamp with time zone",
+          "primaryKey": false,
+          "notNull": false,
+          "default": "now()"
+        },
+        "updated_at": {
+          "name": "updated_at",
+          "type": "timestamp with time zone",
+          "primaryKey": false,
+          "notNull": false,
+          "default": "now()"
+        }
+      },
+      "indexes": {},
+      "foreignKeys": {},
+      "compositePrimaryKeys": {},
+      "uniqueConstraints": {
+        "messages_message_id_unique": {
+          "name": "messages_message_id_unique",
+          "nullsNotDistinct": false,
+          "columns": [
+            "message_id"
+          ]
+        }
+      },
+      "policies": {},
+      "checkConstraints": {},
+      "isRLSEnabled": false
+    },
+    "public.models": {
+      "name": "models",
+      "schema": "",
+      "columns": {
+        "id": {
+          "name": "id",
+          "type": "serial",
+          "primaryKey": true,
+          "notNull": true
+        },
+        "model_id": {
+          "name": "model_id",
+          "type": "varchar(128)",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "name": {
+          "name": "name",
+          "type": "varchar(64)",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "display_name": {
+          "name": "display_name",
+          "type": "varchar(128)",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "description": {
+          "name": "description",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "model_type": {
+          "name": "model_type",
+          "type": "varchar(20)",
+          "primaryKey": false,
+          "notNull": true,
+          "default": "'claude'"
+        },
+        "supports_tools": {
+          "name": "supports_tools",
+          "type": "boolean",
+          "primaryKey": false,
+          "notNull": false,
+          "default": true
+        },
+        "supports_thinking": {
+          "name": "supports_thinking",
+          "type": "boolean",
+          "primaryKey": false,
+          "notNull": false,
+          "default": true
+        },
+        "supports_vision": {
+          "name": "supports_vision",
+          "type": "boolean",
+          "primaryKey": false,
+          "notNull": false,
+          "default": false
+        },
+        "max_tokens": {
+          "name": "max_tokens",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": false,
+          "default": 8192
+        },
+        "context_window": {
+          "name": "context_window",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": false,
+          "default": 200000
+        },
+        "is_enabled": {
+          "name": "is_enabled",
+          "type": "boolean",
+          "primaryKey": false,
+          "notNull": false,
+          "default": true
+        },
+        "is_default": {
+          "name": "is_default",
+          "type": "boolean",
+          "primaryKey": false,
+          "notNull": false,
+          "default": false
+        },
+        "sort_order": {
+          "name": "sort_order",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": false,
+          "default": 0
+        },
+        "created_at": {
+          "name": "created_at",
+          "type": "timestamp with time zone",
+          "primaryKey": false,
+          "notNull": false,
+          "default": "now()"
+        },
+        "updated_at": {
+          "name": "updated_at",
+          "type": "timestamp with time zone",
+          "primaryKey": false,
+          "notNull": false,
+          "default": "now()"
+        }
+      },
+      "indexes": {},
+      "foreignKeys": {},
+      "compositePrimaryKeys": {},
+      "uniqueConstraints": {
+        "models_model_id_unique": {
+          "name": "models_model_id_unique",
+          "nullsNotDistinct": false,
+          "columns": [
+            "model_id"
+          ]
+        }
+      },
+      "policies": {},
+      "checkConstraints": {},
+      "isRLSEnabled": false
+    },
+    "public.notes": {
+      "name": "notes",
+      "schema": "",
+      "columns": {
+        "id": {
+          "name": "id",
+          "type": "serial",
+          "primaryKey": true,
+          "notNull": true
+        },
+        "note_id": {
+          "name": "note_id",
+          "type": "varchar(64)",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "user_id": {
+          "name": "user_id",
+          "type": "varchar(64)",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "conversation_id": {
+          "name": "conversation_id",
+          "type": "varchar(64)",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "message_id": {
+          "name": "message_id",
+          "type": "varchar(64)",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "title": {
+          "name": "title",
+          "type": "varchar(255)",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "content": {
+          "name": "content",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "tags": {
+          "name": "tags",
+          "type": "jsonb",
+          "primaryKey": false,
+          "notNull": false,
+          "default": "'[]'::jsonb"
+        },
+        "is_pinned": {
+          "name": "is_pinned",
+          "type": "boolean",
+          "primaryKey": false,
+          "notNull": false,
+          "default": false
+        },
+        "is_archived": {
+          "name": "is_archived",
+          "type": "boolean",
+          "primaryKey": false,
+          "notNull": false,
+          "default": false
+        },
+        "created_at": {
+          "name": "created_at",
+          "type": "timestamp with time zone",
+          "primaryKey": false,
+          "notNull": false,
+          "default": "now()"
+        },
+        "updated_at": {
+          "name": "updated_at",
+          "type": "timestamp with time zone",
+          "primaryKey": false,
+          "notNull": false,
+          "default": "now()"
+        }
+      },
+      "indexes": {},
+      "foreignKeys": {},
+      "compositePrimaryKeys": {},
+      "uniqueConstraints": {
+        "notes_note_id_unique": {
+          "name": "notes_note_id_unique",
+          "nullsNotDistinct": false,
+          "columns": [
+            "note_id"
+          ]
+        }
+      },
+      "policies": {},
+      "checkConstraints": {},
+      "isRLSEnabled": false
+    },
+    "public.tools": {
+      "name": "tools",
+      "schema": "",
+      "columns": {
+        "id": {
+          "name": "id",
+          "type": "serial",
+          "primaryKey": true,
+          "notNull": true
+        },
+        "tool_id": {
+          "name": "tool_id",
+          "type": "varchar(64)",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "name": {
+          "name": "name",
+          "type": "varchar(64)",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "display_name": {
+          "name": "display_name",
+          "type": "varchar(128)",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "description": {
+          "name": "description",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "icon": {
+          "name": "icon",
+          "type": "varchar(64)",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "input_schema": {
+          "name": "input_schema",
+          "type": "jsonb",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "is_enabled": {
+          "name": "is_enabled",
+          "type": "boolean",
+          "primaryKey": false,
+          "notNull": false,
+          "default": true
+        },
+        "is_default": {
+          "name": "is_default",
+          "type": "boolean",
+          "primaryKey": false,
+          "notNull": false,
+          "default": false
+        },
+        "sort_order": {
+          "name": "sort_order",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": false,
+          "default": 0
+        },
+        "created_at": {
+          "name": "created_at",
+          "type": "timestamp with time zone",
+          "primaryKey": false,
+          "notNull": false,
+          "default": "now()"
+        },
+        "updated_at": {
+          "name": "updated_at",
+          "type": "timestamp with time zone",
+          "primaryKey": false,
+          "notNull": false,
+          "default": "now()"
+        }
+      },
+      "indexes": {},
+      "foreignKeys": {},
+      "compositePrimaryKeys": {},
+      "uniqueConstraints": {
+        "tools_tool_id_unique": {
+          "name": "tools_tool_id_unique",
+          "nullsNotDistinct": false,
+          "columns": [
+            "tool_id"
+          ]
+        }
+      },
+      "policies": {},
+      "checkConstraints": {},
+      "isRLSEnabled": false
+    },
+    "public.user_favorite_assistants": {
+      "name": "user_favorite_assistants",
+      "schema": "",
+      "columns": {
+        "id": {
+          "name": "id",
+          "type": "serial",
+          "primaryKey": true,
+          "notNull": true
+        },
+        "user_id": {
+          "name": "user_id",
+          "type": "varchar(64)",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "assistant_id": {
+          "name": "assistant_id",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "created_at": {
+          "name": "created_at",
+          "type": "timestamp with time zone",
+          "primaryKey": false,
+          "notNull": false,
+          "default": "now()"
+        }
+      },
+      "indexes": {},
+      "foreignKeys": {},
+      "compositePrimaryKeys": {},
+      "uniqueConstraints": {},
+      "policies": {},
+      "checkConstraints": {},
+      "isRLSEnabled": false
+    },
+    "public.user_settings": {
+      "name": "user_settings",
+      "schema": "",
+      "columns": {
+        "id": {
+          "name": "id",
+          "type": "serial",
+          "primaryKey": true,
+          "notNull": true
+        },
+        "user_id": {
+          "name": "user_id",
+          "type": "varchar(64)",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "cch_url": {
+          "name": "cch_url",
+          "type": "varchar(512)",
+          "primaryKey": false,
+          "notNull": true,
+          "default": "'http://localhost:13500'"
+        },
+        "cch_api_key": {
+          "name": "cch_api_key",
+          "type": "varchar(512)",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "cch_api_key_configured": {
+          "name": "cch_api_key_configured",
+          "type": "boolean",
+          "primaryKey": false,
+          "notNull": false,
+          "default": false
+        },
+        "api_format": {
+          "name": "api_format",
+          "type": "varchar(20)",
+          "primaryKey": false,
+          "notNull": false,
+          "default": "'claude'"
+        },
+        "default_model": {
+          "name": "default_model",
+          "type": "varchar(64)",
+          "primaryKey": false,
+          "notNull": false,
+          "default": "'claude-sonnet-4-20250514'"
+        },
+        "default_tools": {
+          "name": "default_tools",
+          "type": "jsonb",
+          "primaryKey": false,
+          "notNull": false,
+          "default": "'[\"web_search\",\"code_execution\",\"web_fetch\"]'::jsonb"
+        },
+        "system_prompt": {
+          "name": "system_prompt",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "temperature": {
+          "name": "temperature",
+          "type": "varchar(10)",
+          "primaryKey": false,
+          "notNull": false,
+          "default": "'0.7'"
+        },
+        "theme": {
+          "name": "theme",
+          "type": "varchar(20)",
+          "primaryKey": false,
+          "notNull": false,
+          "default": "'light'"
+        },
+        "language": {
+          "name": "language",
+          "type": "varchar(10)",
+          "primaryKey": false,
+          "notNull": false,
+          "default": "'zh-CN'"
+        },
+        "font_size": {
+          "name": "font_size",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": false,
+          "default": 15
+        },
+        "enable_thinking": {
+          "name": "enable_thinking",
+          "type": "boolean",
+          "primaryKey": false,
+          "notNull": false,
+          "default": false
+        },
+        "save_chat_history": {
+          "name": "save_chat_history",
+          "type": "boolean",
+          "primaryKey": false,
+          "notNull": false,
+          "default": true
+        },
+        "created_at": {
+          "name": "created_at",
+          "type": "timestamp with time zone",
+          "primaryKey": false,
+          "notNull": false,
+          "default": "now()"
+        },
+        "updated_at": {
+          "name": "updated_at",
+          "type": "timestamp with time zone",
+          "primaryKey": false,
+          "notNull": false,
+          "default": "now()"
+        }
+      },
+      "indexes": {},
+      "foreignKeys": {},
+      "compositePrimaryKeys": {},
+      "uniqueConstraints": {
+        "user_settings_user_id_unique": {
+          "name": "user_settings_user_id_unique",
+          "nullsNotDistinct": false,
+          "columns": [
+            "user_id"
+          ]
+        }
+      },
+      "policies": {},
+      "checkConstraints": {},
+      "isRLSEnabled": false
+    },
+    "public.users": {
+      "name": "users",
+      "schema": "",
+      "columns": {
+        "id": {
+          "name": "id",
+          "type": "serial",
+          "primaryKey": true,
+          "notNull": true
+        },
+        "user_id": {
+          "name": "user_id",
+          "type": "varchar(64)",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "email": {
+          "name": "email",
+          "type": "varchar(255)",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "password": {
+          "name": "password",
+          "type": "varchar(255)",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "nickname": {
+          "name": "nickname",
+          "type": "varchar(64)",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "avatar": {
+          "name": "avatar",
+          "type": "varchar(512)",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "plan": {
+          "name": "plan",
+          "type": "varchar(20)",
+          "primaryKey": false,
+          "notNull": false,
+          "default": "'free'"
+        },
+        "status": {
+          "name": "status",
+          "type": "varchar(20)",
+          "primaryKey": false,
+          "notNull": false,
+          "default": "'active'"
+        },
+        "email_verified": {
+          "name": "email_verified",
+          "type": "boolean",
+          "primaryKey": false,
+          "notNull": false,
+          "default": false
+        },
+        "last_login_at": {
+          "name": "last_login_at",
+          "type": "timestamp with time zone",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "created_at": {
+          "name": "created_at",
+          "type": "timestamp with time zone",
+          "primaryKey": false,
+          "notNull": false,
+          "default": "now()"
+        },
+        "updated_at": {
+          "name": "updated_at",
+          "type": "timestamp with time zone",
+          "primaryKey": false,
+          "notNull": false,
+          "default": "now()"
+        }
+      },
+      "indexes": {},
+      "foreignKeys": {},
+      "compositePrimaryKeys": {},
+      "uniqueConstraints": {
+        "users_user_id_unique": {
+          "name": "users_user_id_unique",
+          "nullsNotDistinct": false,
+          "columns": [
+            "user_id"
+          ]
+        },
+        "users_email_unique": {
+          "name": "users_email_unique",
+          "nullsNotDistinct": false,
+          "columns": [
+            "email"
+          ]
+        }
+      },
+      "policies": {},
+      "checkConstraints": {},
+      "isRLSEnabled": false
+    },
+    "public.verification_codes": {
+      "name": "verification_codes",
+      "schema": "",
+      "columns": {
+        "id": {
+          "name": "id",
+          "type": "serial",
+          "primaryKey": true,
+          "notNull": true
+        },
+        "email": {
+          "name": "email",
+          "type": "varchar(255)",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "code": {
+          "name": "code",
+          "type": "varchar(6)",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "type": {
+          "name": "type",
+          "type": "varchar(20)",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "expires_at": {
+          "name": "expires_at",
+          "type": "timestamp with time zone",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "used": {
+          "name": "used",
+          "type": "boolean",
+          "primaryKey": false,
+          "notNull": false,
+          "default": false
+        },
+        "created_at": {
+          "name": "created_at",
+          "type": "timestamp with time zone",
+          "primaryKey": false,
+          "notNull": false,
+          "default": "now()"
+        }
+      },
+      "indexes": {},
+      "foreignKeys": {},
+      "compositePrimaryKeys": {},
+      "uniqueConstraints": {},
+      "policies": {},
+      "checkConstraints": {},
+      "isRLSEnabled": false
+    }
+  },
+  "enums": {},
+  "schemas": {},
+  "sequences": {},
+  "roles": {},
+  "policies": {},
+  "views": {},
+  "_meta": {
+    "columns": {},
+    "schemas": {},
+    "tables": {}
+  }
+}
\ No newline at end of file
diff --git a/src/drizzle/migrations/meta/_journal.json b/src/drizzle/migrations/meta/_journal.json
index 3459908..1ac8e64 100644
--- a/src/drizzle/migrations/meta/_journal.json
+++ b/src/drizzle/migrations/meta/_journal.json
@@ -57,6 +57,13 @@
       "when": 1766299055211,
       "tag": "0007_fantastic_molten_man",
       "breakpoints": true
+    },
+    {
+      "idx": 8,
+      "version": "7",
+      "when": 1766314954003,
+      "tag": "0008_flat_star_brand",
+      "breakpoints": true
     }
   ]
 }
\ No newline at end of file
diff --git a/src/drizzle/schema.ts b/src/drizzle/schema.ts
index 15a6a59..94d070d 100644
--- a/src/drizzle/schema.ts
+++ b/src/drizzle/schema.ts
@@ -63,8 +63,10 @@ export const userSettings = pgTable('user_settings', {
   cchUrl: varchar('cch_url', { length: 512 }).notNull().default('http://localhost:13500'),
   cchApiKey: varchar('cch_api_key', { length: 512 }),
   cchApiKeyConfigured: boolean('cch_api_key_configured').default(false),
+  // API 格式类型：claude（原生）| openai（兼容）
+  apiFormat: varchar('api_format', { length: 20 }).default('claude'),
   // 默认设置
-  defaultModel: varchar('default_model', { length: 64 }).default('claude-sonnet-4-20250514'),
+  defaultModel: varchar('default_model', { length: 64 }).default('claude-sonnet-4-5-20250929'),
   defaultTools: jsonb('default_tools').$type<string[]>().default(['web_search', 'code_execution', 'web_fetch']),
   // AI 行为设置
   systemPrompt: text('system_prompt'), // 系统提示词
diff --git a/src/hooks/useSettings.ts b/src/hooks/useSettings.ts
index 5b76f28..94ae9b5 100644
--- a/src/hooks/useSettings.ts
+++ b/src/hooks/useSettings.ts
@@ -5,6 +5,7 @@ import { useState, useEffect, useCallback } from 'react';
 export interface Settings {
   cchUrl: string;
   cchApiKeyConfigured: boolean;
+  apiFormat: 'claude' | 'openai';
   defaultModel: string;
   defaultTools: string[];
   systemPrompt: string;
@@ -50,7 +51,8 @@ export interface Model {
 const defaultSettings: Settings = {
   cchUrl: 'http://localhost:13500',
   cchApiKeyConfigured: false,
-  defaultModel: 'claude-sonnet-4-20250514',
+  apiFormat: 'claude',
+  defaultModel: 'claude-sonnet-4-5-20250929',
   defaultTools: ['web_search', 'code_execution', 'web_fetch'],
   systemPrompt: '',
   temperature: '0.7',