Update app.py

app.py

@@ -39,7 +39,7 @@ def convert_currency(amount: float, from_currency: str, to_currency: str) -> flo
 
 
 tools = [convert_currency]
-llm = ChatOpenAI(model="gpt-4o", temperature=0)
+llm = ChatOpenAI(model="gpt-4", temperature=0)
 #llm_with_tools = llm.bind_tools(tools, parallel_tool_calls=False)
 
 # System message