diff --git a/src/shared/key-management/openai/checker.ts b/src/shared/key-management/openai/checker.ts
index 5cec227..7ebd93b 100644
--- a/src/shared/key-management/openai/checker.ts
+++ b/src/shared/key-management/openai/checker.ts
@@ -353,7 +353,7 @@ export class OpenAIKeyChecker extends KeyCheckerBase<OpenAIKey> {
     
     try {
       const payload = {
-        model: "gpt-5-nano",
+        model: "gpt-5",
         messages: [{ role: "user", content: "Hi" }],
         max_completion_tokens: 1,
         stream: true