Update app.py

app.py

@@ -22,7 +22,7 @@ LIMIT_WORDS_PARA = 7
 # Function to guess a single topic for a given text
 def guess_topic(clause_text):
     response = client.chat.completions.create(
-      model="gpt-4",
+      model="gpt-4o",
       messages=[
         {
           "role": "system",