# from langchain_google_genai import ChatGoogleGenerativeAI

from langchain_community.chat_models import MiniMaxChat

_llm = None


def get_llm():
    """Return a shared LLM instance."""
    global _llm
    if _llm is None:
        # _llm = ChatGoogleGenerativeAI(model="gemini-3-flash-preview")
        _llm = MiniMaxChat(model="m2.5-highspeed")
    return _llm