Update app.py

app.py

@@ -55,8 +55,8 @@ def parse_query(nl_query):
     ]
 
     try:
-        response = openai.ChatCompletion.create(
-            model="gpt-4",
+        response = openai.chat.completions.create(
+            model="gpt-4o-mini",
             messages=messages,
             temperature=0,
             max_tokens=150,