agent_llm = ChatOpenAI( model=DEFAULT_LLM, api_key=OPENAI_API_KEY, base_url=PORTKEY_GATEWAY_URL, default_headers=createHeaders( api_key=PORTKEY_API_KEY, #virtual_key=PORTKEY_VIRTUAL_OPENAI_API_KEY ) )
DEFAULT_LLM = "gpt-3.5-turbo"