langchain-litellm is a PyPi package that contains the LangChain integration with LiteLLM. It provides the ChatLiteLLM as well as the ChatLiteLLMRouter class to users. Github: https://github.com/Akshay-Dongare/langchain-litellm and PyPi: https://pypi.org/project/langchain-litellm/
LiteLLM is a library that simplifies calling Anthropic, Azure, Huggingface, Replicate, etc. and this package allows users to take advantage of it within the LangChain framework.
The package has 17,000+ downloads and is officially documented on the LangChain website at https://python.langchain.com/docs/integrations/chat/litellm/