diff --git a/frontend/src/types/index.ts b/frontend/src/types/index.ts
index 9a4184c5..a54cfcef 100644
--- a/frontend/src/types/index.ts
+++ b/frontend/src/types/index.ts
@@ -560,7 +560,6 @@ export interface ProxyQualityCheckResult {
 export interface GeminiCredentials {
   // API Key authentication
   api_key?: string
-  model_mapping?: Record<string, string>
 
   // OAuth authentication
   access_token?: string