change gpt case

app.py

@@ -411,7 +411,7 @@ if option == "OpenReview paper ID":
     paper_id = paper_id.strip()
     reviewer_id = st.text_input("Enter reviewer ID (e.g. gNxe):")
     reviewer_id = reviewer_id.strip()
-    model = st.text_input("Which model? ('GPT' or 'Claude')")
+    model = st.text_input("Which model? ('gpt' or 'claude')")
     if paper_id and reviewer_id:
         upload_file = False
         user_input = True