from langchain_openai import ChatOpenAI
import os

def get_llm(openai_api_key: str, temperature: float = 0):
    """Returns the LongCat-Flash-Lite LLM instance."""
    return ChatOpenAI(
        model_name="LongCat-Flash-Lite",
        base_url="https://api.longcat.chat/openai",
        temperature=temperature,
        openai_api_key=openai_api_key
    )