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LangChain is LLM agnostic. People are using it with Cohere's LLMs and even self-hosted LLMs like LLaMA.

I would say LangChain is similar to ChatGPT itself.

- LangChain's Retriever is analogous to ChatGPT Retrieval Plugin. - In general, LangChain has tools for what ChatGPT calls Plugins. - ChatGPT uses OpenAI's GPT-4 LLM. LangChain uses ... any LLM (i.e. configurable).

It's the backend of retrieval plugin basically

The retrieval plugin does not use LangChain, afaik.

Guess I can't delete my comment but I guess "basically" in this context means a similar type implementation