langchain/templates/rag-pinecone-rerank/README.md

# RAG Pinecone Cohere Re-rank

This template performs RAG using Pinecone and OpenAI, with [Cohere to perform re-ranking](https://python.langchain.com/docs/integrations/retrievers/cohere-reranker) on returned documents.

[Re-ranking](https://docs.cohere.com/docs/reranking) provides a way to rank retrieved documents using specified filters or criteria.

##  Pinecone

This connects to a hosted Pinecone vectorstore.

Be sure that you have set a few env variables in `chain.py`:

* `PINECONE_API_KEY`
* `PINECONE_ENV`
* `index_name`

##  LLM

Be sure that `OPENAI_API_KEY` is set in order to the OpenAI models.

##  Cohere

Be sure that `COHERE_API_KEY` is set in order to the ReRank endpoint.