Update app.py

app.py

@@ -101,7 +101,7 @@ def process_files_fixed(image_path, page_identifier, error_pages):
     """
 
     payload = {
-        "model": "gpt-4-vision-preview",
+        "model": "gpt-4-turbo",
         "messages": [
             {
                 "role": "user",