Update agent_llamaindex.py

agent_llamaindex.py

@@ -14,7 +14,7 @@ def date_tool(text: str) -> str:
 
 def agent_llamaindex(config, prompt):
     llm = OpenAI(
-        model = config["model_name"],
+        model = config["model"],
         temperature = config["temperature"])
 
     tool_spec = OpenWeatherMapToolSpec(key = os.environ["OPENWEATHERMAP_API_KEY"])