Update app.py

app.py

@@ -13,7 +13,7 @@ AGENT_LANGCHAIN  = "LangChain"
 AGENT_LLAMAINDEX = "LlamaIndex"
 
 config = {
-    "model": "gpt-3.5-turbo", # "gpt-4-0613",
+    "model": "gpt-4-0613",
     "temperature": 0
 }