diff --git a/internal/runtime/executor/codex_executor.go b/internal/runtime/executor/codex_executor.go
index 728e7cb7..6cfc0c24 100644
--- a/internal/runtime/executor/codex_executor.go
+++ b/internal/runtime/executor/codex_executor.go
@@ -643,7 +643,6 @@ func applyCodexHeaders(r *http.Request, auth *cliproxyauth.Auth, token string, s
 	}
 
 	misc.EnsureHeader(r.Header, ginHeaders, "Version", codexClientVersion)
-	misc.EnsureHeader(r.Header, ginHeaders, "Openai-Beta", "responses=experimental")
 	misc.EnsureHeader(r.Header, ginHeaders, "Session_id", uuid.NewString())
 	misc.EnsureHeader(r.Header, ginHeaders, "User-Agent", codexUserAgent)