import os from dotenv import load_dotenv from langchain.chat_models import init_chat_model load_dotenv() model = init_chat_model( model=os.getenv('MODEL_NAME'), model_provider="openai", base_url=os.getenv('MODEL_BASE_URL'), api_key=os.getenv('MODEL_API_KEY') ) # MODEL_NAME=deepseek-v4-flash # MODEL_BASE_URL=https://api.deepseek.com # MODEL_API_KEY=sk-0b237d41f6bc44fc9732ea66bd7eade0