Update app.py

app.py

@@ -78,7 +78,7 @@ def talk_to_llm(user_prompt):
     '''
 
     data = {
-        "model": "gpt-4-o",
+        "model": "gpt-4o",
         "response_format": { "type": "json_object" },
         "messages": [
             {"role": "system", "content": prompt_text},