diff --git a/package.json b/package.json
index 6deb1ba..8de5f46 100644
--- a/package.json
+++ b/package.json
@@ -12,6 +12,7 @@
     "fix": "eslint . --fix"
   },
   "dependencies": {
+    "@jsonlee_12138/enum": "^1.0.1",
     "element-plus": "^2.9.8",
     "hook-fetch": "^1.0.1",
     "pinia": "^3.0.2",
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index fe19e25..bdf20db 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -8,6 +8,9 @@ importers:
 
   .:
     dependencies:
+      '@jsonlee_12138/enum':
+        specifier: ^1.0.1
+        version: 1.0.1
       element-plus:
         specifier: ^2.9.8
         version: 2.9.8(vue@3.5.13(typescript@5.7.3))
@@ -644,6 +647,9 @@ packages:
   '@jridgewell/trace-mapping@0.3.25':
     resolution: {integrity: sha512-vNk6aEwybGtawWmy/PzwnGDOjCkLWSD2wqvjGGAgOAwCGWySYXfYoxt00IJkTF+8Lb57DwOb3Aa0o9CApepiYQ==}
 
+  '@jsonlee_12138/enum@1.0.1':
+    resolution: {integrity: sha512-33Zgvu3Oi0FblWdyuOOU1oFr1GDxNMloyVRPDMc+riOPZlQcP+TdHJODd6lZuZWOETPCIyaBdYaElZe0XoyZsA==}
+
   '@jsonlee_12138/markdown-it-mermaid@0.0.3':
     resolution: {integrity: sha512-PLIexJKys3ml67M5NmTJv+8hZUX36VwHLvbW82QfxVzMCfiutigA2qjrvLZd/WjSr6Ut9vbSwgAlh9CMLPA8SQ==}
     peerDependencies:
@@ -4606,6 +4612,8 @@ snapshots:
       '@jridgewell/resolve-uri': 3.1.2
       '@jridgewell/sourcemap-codec': 1.5.0
 
+  '@jsonlee_12138/enum@1.0.1': {}
+
   '@jsonlee_12138/markdown-it-mermaid@0.0.3(markdown-it@14.1.0)(mermaid@11.6.0)':
     dependencies:
       markdown-it: 14.1.0
diff --git a/src/api/chat/types.ts b/src/api/chat/types.ts
index b822a2f..4d5d6f1 100644
--- a/src/api/chat/types.ts
+++ b/src/api/chat/types.ts
@@ -1,3 +1,5 @@
+import type { ModelType } from '@/constants/enums';
+
 /**
  * ChatRequest，描述：对话请求对象
  */
@@ -19,7 +21,7 @@ export interface SendDTO {
    */
   kid?: string;
   messages: Message[];
-  model: string;
+  model: ModelType;
   /**
    * 提示词
    */
diff --git a/src/constants/enums.ts b/src/constants/enums.ts
new file mode 100644
index 0000000..a5235d2
--- /dev/null
+++ b/src/constants/enums.ts
@@ -0,0 +1,7 @@
+import type { EnumValue } from '@jsonlee_12138/enum';
+import Enum from '@jsonlee_12138/enum';
+
+export const ModelEnum = Enum.create({
+  GPT_4o_MINI: Enum.Item('gpt-4o-mini'),
+});
+export type ModelType = EnumValue<typeof ModelEnum>;
diff --git a/src/pages/chat/index.vue b/src/pages/chat/index.vue
index 378674b..5ad6cc7 100644
--- a/src/pages/chat/index.vue
+++ b/src/pages/chat/index.vue
@@ -1,6 +1,7 @@
 <script setup lang="ts">
 import { createSession } from '@/api';
 import { send } from '@/api/chat';
+import { ModelEnum } from '@/constants/enums';
 import { useUserStore } from '@/store';
 import { useChatStore } from '@/store/modules/chat';
 import { BubbleList, Sender } from 'vue-element-plus-x';
@@ -61,7 +62,7 @@ async function handleSend() {
   loading.value = true;
   const req = send({
     sessionId: chatId.value,
-    model: 'gpt-4o-mini',
+    model: ModelEnum.GPT_4o_MINI.value,
     messages: [
       {
         role: 'user',