Update app.py

app.py

@@ -18,7 +18,7 @@ os.environ["OPENAI_API_KEY"] = "sk-proj-RjUY8U-Fo9sR3NRiAppGItyftxLUA65zYoPlkGPI
 #Function to return the response
 def load_answer(question):
     # "text-davinci-003" model is depreciated, so using the latest one https://platform.openai.com/docs/deprecations
-    llm = OpenAI(model_name="gpt-4o-mini",temperature=0)
+    llm = ChatOpenAI(model_name="gpt-4o-mini",temperature=0)
 
     #Last week langchain has recommended to use invoke function for the below please :)
     answer=llm.invoke(question)