Update app.py

app.py

@@ -104,7 +104,7 @@ def process_files(ground_truth_file, pdf_files):
 
      # Add OpenAI response column
     queries_t['response'] = openai.chat_completions(
-        model='gpt-4o-mini-2024-07-18, messages=messages
+        model='gpt-4o-mini-2024-07-18', messages=messages
     )
     
     # Extract the answer text from the API response