OpenAI API를 활용한 코드 실행 (API 발급받기, Billing, ChatOpenAI 실행)
import getpass
import os
if not os.environ.get("OPENAI_API_KEY"):
os.environ["OPENAI_API_KEY"] = getpass.getpass("Enter API key for OpenAI: ")
from langchain_openai import ChatOpenAI
model = ChatOpenAI(model="gpt-4o-mini")
response = model.invoke("Hi!")
print(response)