Found the answer here: https://github.com/openai/chatgpt-retrieval-plugin#retrieval-plugin https://github.com/openai/chatgpt-retrieval-plugin#retrieval...

Found the answer here: https://github.com/openai/chatgpt-retrieval-plugin#retrieval-plugin https://github.com/openai/chatgpt-retrieval-plugin#retrieval... The plugin uses OpenAI's text-embedding-ada-002 embeddings model to generate embeddings of document chunks, and then stores and queries them using a vector database on the backend. As an open-source and self-hosted solution, developers can deploy their own Retrieval Plugin and register it with ChatGPT. The Retrieval Plugin supports several vector database providers, allowing developers to choose their preferred one from a list.