diff --git a/frontend/src/i18n/locales/en/admin/overview.ts b/frontend/src/i18n/locales/en/admin/overview.ts
index 41a7781c8c..87c38ebe4e 100644
--- a/frontend/src/i18n/locales/en/admin/overview.ts
+++ b/frontend/src/i18n/locales/en/admin/overview.ts
@@ -1154,7 +1154,9 @@ export default {
       openaiFast: {
         title: 'OpenAI Fast mode',
         force: 'Force Fast (priority)',
-        hint: 'Forces service_tier=priority on OpenAI requests in this group. The global Fast/Flex policy can still filter or block it. New requests update immediately after saving; existing WebSocket sessions must reconnect.'
+        hint: 'Forces service_tier=priority on OpenAI requests in this group. The global Fast/Flex policy can still filter or block it. New requests update immediately after saving; existing WebSocket sessions must reconnect.',
+        free: 'Free Fast',
+        freeHint: 'Fast requests in this group still use the priority tier, but customers are charged the equivalent Standard price.'
       },
       invalidRequestFallback: {
         title: 'Invalid Request Fallback Group',
diff --git a/frontend/src/i18n/locales/zh/admin/overview.ts b/frontend/src/i18n/locales/zh/admin/overview.ts
index 27cf6fdfd7..d4bb80c9bf 100644
--- a/frontend/src/i18n/locales/zh/admin/overview.ts
+++ b/frontend/src/i18n/locales/zh/admin/overview.ts
@@ -1152,7 +1152,9 @@ export default {
       openaiFast: {
         title: 'OpenAI Fast 模式',
         force: '强制使用 Fast（priority）',
-        hint: '开启后，此分组的 OpenAI 请求会强制写入 service_tier=priority；全局 Fast/Flex 策略仍可过滤或拦截。保存后新请求立即生效，已建立的 WebSocket 会话需重连。'
+        hint: '开启后，此分组的 OpenAI 请求会强制写入 service_tier=priority；全局 Fast/Flex 策略仍可过滤或拦截。保存后新请求立即生效，已建立的 WebSocket 会话需重连。',
+        free: '免费 Fast',
+        freeHint: '该分组的 Fast 请求仍使用 priority 档位，但客户实际费用按同一请求的 Standard 价格计算。'
       },
       invalidRequestFallback: {
         title: '无效请求兜底分组',