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Libraries and SDKs

Code you import rather than software you run.

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  • UniversalLIBRARYFree, open source

    LlamaIndex

    A Python framework for retrieval only. It connects a model to your own documents, databases or APIs, and does not try to chain everything.

    Tested on Claude Sonnet · Jun 2026

    Coding0050AI Place Hub
  • UniversalLIBRARYFree, open source

    Vercel AI SDK

    A TypeScript library for streaming model responses into a web UI. Hooks handle the streaming and state so you do not build them by hand.

    Tested on GPT-5 · Jun 2026

    Coding0044AI Place Hub
  • UniversalLIBRARYFree, open source

    LangChain

    A Python and JavaScript framework for chaining prompts, tools and retrieval into a pipeline, with a large set of ready-made integrations.

    Tested on GPT-5 · Jun 2026

    Coding0047AI Place Hub
  • UniversalLIBRARYFree, open source

    Instructor

    A small Python library that forces a model output into a Pydantic schema and retries automatically when the response fails validation.

    Tested on Claude Sonnet · Jun 2026

    Coding0047AI Place Hub
  • UniversalLIBRARYFree, open source; deepset also offers a paid hosted platform

    Haystack

    An open-source Python framework from deepset for production retrieval and search pipelines, with more explicit pipeline control than most…

    Tested on GPT-5 · Jun 2026

    Coding0046AI Place Hub