diff --git a/docs/intro/model-config.md b/docs/intro/model-config.md
index 600a9e6f..bea4d886 100644
--- a/docs/intro/model-config.md
+++ b/docs/intro/model-config.md
@@ -133,12 +133,12 @@ models = [
 [model_names.api-proxy]
 name = "API 中转服务"
 base_url = "https://api-proxy.example.com/v1"
-default = "gpt-3.5-turbo"
+default = "gpt-5"
 env = "API_PROXY_KEY"
 models = [
-    "gpt-3.5-turbo",
-    "gpt-4",
-    "claude-3-sonnet"
+    "gpt-5",
+    "deepseek-chat",
+    "claude-4.6-sonnet"
 ]
 ```
 
diff --git a/web/src/components/ModelProvidersComponent.vue b/web/src/components/ModelProvidersComponent.vue
index 9d112d98..d03fb29c 100644
--- a/web/src/components/ModelProvidersComponent.vue
+++ b/web/src/components/ModelProvidersComponent.vue
@@ -357,7 +357,7 @@
             v-model:value="customProviderModal.data.env"
             placeholder="请输入API密钥或环境变量名（如：MY_API_KEY）"
           />
-          <div class="form-help-text">支持直接输入API密钥，或使用环境变量名（如：MY_API_KEY）</div>
+          <div class="form-help-text">支持直接输入API密钥，或使用环境变量名（如：MY_API_KEY），如无密钥填写"无"。</div>
         </a-form-item>
 
         <a-form-item label="支持的模型" name="models">
@@ -366,7 +366,7 @@
             placeholder="请输入支持的模型列表，每行一个模型"
             :rows="4"
           />
-          <div class="form-help-text">每行输入一个模型名称，例如：gpt-3.5-turbo</div>
+          <div class="form-help-text">每行输入一个模型名称，例如：gpt-5</div>
         </a-form-item>
 
         <a-form-item label="文档地址" name="url">
@@ -720,6 +720,13 @@ const saveCustomProvider = async () => {
       .map((model) => model.trim())
       .filter((model) => model.length > 0)
 
+    // 校验默认模型必须在支持的模型列表中
+    if (models.length > 0 && !models.includes(customProviderModal.data.default)) {
+      message.error(`默认模型 "${customProviderModal.data.default}" 不在支持的模型列表中`)
+      customProviderModal.loading = false
+      return
+    }
+
     const providerData = {
       name: customProviderModal.data.name,
       base_url: customProviderModal.data.base_url,