Update app.py

app.py

@@ -62,7 +62,7 @@ def fix_code_bugs(buggy_code, model="gpt-4o-mini"):
 def generate_math_solution(query):
     prompt = f"Explain and solve the following mathematical problem step by step: {query}"
     response = openai.ChatCompletion.create(
-        model="gpt-4o-mini",
+        model="gpt-3.5-turbo",
         messages=[{"role": "user", "content": prompt}]
     )
     return response['choices'][0]['message']['content']