Update excel_chat.py

excel_chat.py

@@ -60,7 +60,7 @@ def ask_llm(query, user_input, client_index, user, keys):
 
     elif "GPT 4o" in client_index:
         client = OpenAI(api_key=os.environ["OPENAI_YCHK"])
-        response = client.messages.create(
+        response = client.chat.completions.create(
             model="gpt-4o",
             messages=messageC
         )
@@ -73,7 +73,7 @@ def ask_llm(query, user_input, client_index, user, keys):
                 "Perplexity Llama3 70b": "llama-3-70b-instruct",
                 "Perplexity Llama3 8b": "llama-3-8b-instruct"
             }
-        response = client.messages.create(
+        response = client.chat.completions.create(
             model=model_map[client_index],
             messages=messageC
         )