Update app.py

app.py

@@ -57,7 +57,7 @@ try:
 
     Answer:"""
     human_message = HumanMessagePromptTemplate.from_template(template=human_template)
-    llm = ChatOpenAI(model="gpt-4-0125-preview", streaming=True)
+    llm = ChatOpenAI(model="gpt-3.5-turbo-0125", streaming=True)
     prompt = ChatPromptTemplate.from_messages(messages=[system_message, human_message])
     parser = StrOutputParser()
     prompt_chain = prompt | llm | parser