Update app.py

app.py

@@ -249,7 +249,7 @@ def send_message():
                 "https://api.openai.com/v1/chat/completions",
                 headers=HEADERS,
                 json={
-                    "model": "gpt-4o",
+                    "model": "gpt-4.1",
                     "messages": chat_messages,
                     "functions": function_schema,
                     "function_call": "auto",
@@ -299,7 +299,7 @@ def send_message():
                     "https://api.openai.com/v1/chat/completions",
                     headers=HEADERS,
                     json={
-                        "model": "gpt-4o",
+                        "model": "gpt-4.1",
                         "messages": followup_messages,
                         "temperature": 0,
                         "max_tokens": 1200,