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No, it doesn't use langchain and yes it uses OpenAI.

• felipesabino 3y ago
  Care to elaborate? I mean, looking at the source code it clearly does use LangChain for PDF ingestion https://github.com/mayooear/gpt4-pdf-chatbot-langchain/blob/main/scripts/ingest-data.ts#L1 https://github.com/mayooear/gpt4-pdf-chatbot-langchain/blob/...
  • ffpip 3y ago
    He might mean the site chatpdf.com does not use langchain but uses the OpenAI API.
    • sensibar 3y ago
      Yes, that's what I meant.