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78 lines
4.9 KiB
Markdown
78 lines
4.9 KiB
Markdown
<p align="center">
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<picture>
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<source media="(prefers-color-scheme: light)" srcset=".github/images/logo-dark.svg">
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<source media="(prefers-color-scheme: dark)" srcset=".github/images/logo-light.svg">
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<img alt="LangChain Logo" src=".github/images/logo-dark.svg" width="80%">
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</picture>
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</p>
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<p align="center">
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The platform for reliable agents.
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</p>
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<p align="center">
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<a href="https://opensource.org/licenses/MIT" target="_blank">
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<img src="https://img.shields.io/pypi/l/langchain" alt="PyPI - License">
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</a>
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<a href="https://pypistats.org/packages/langchain" target="_blank">
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<img src="https://img.shields.io/pepy/dt/langchain" alt="PyPI - Downloads">
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</a>
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<a href="https://pypi.org/project/langchain/#history" target="_blank">
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<img src="https://img.shields.io/pypi/v/langchain?label=%20" alt="Version">
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</a>
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<a href="https://vscode.dev/redirect?url=vscode://ms-vscode-remote.remote-containers/cloneInVolume?url=https://github.com/langchain-ai/langchain" target="_blank">
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<img src="https://img.shields.io/static/v1?label=Dev%20Containers&message=Open&color=blue&logo=visualstudiocode" alt="Open in Dev Containers">
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</a>
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<a href="https://codespaces.new/langchain-ai/langchain" target="_blank">
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<img src="https://github.com/codespaces/badge.svg" alt="Open in Github Codespace" title="Open in Github Codespace" width="150" height="20">
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</a>
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<a href="https://codspeed.io/langchain-ai/langchain" target="_blank">
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<img src="https://img.shields.io/endpoint?url=https://codspeed.io/badge.json" alt="CodSpeed Badge">
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</a>
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<a href="https://twitter.com/langchainai" target="_blank">
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<img src="https://img.shields.io/twitter/url/https/twitter.com/langchainai.svg?style=social&label=Follow%20%40LangChainAI" alt="Twitter / X">
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</a>
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</p>
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LangChain is a framework for building LLM-powered applications. It helps you chain together interoperable components and third-party integrations to simplify AI application development — all while future-proofing decisions as the underlying technology evolves.
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```bash
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pip install langchain
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```
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---
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**Documentation**: To learn more about LangChain, check out [the docs](https://docs.langchain.com/oss/python/langchain/overview).
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If you're looking for more advanced customization or agent orchestration, check out [LangGraph](https://docs.langchain.com/oss/python/langgraph/overview), our framework for building controllable agent workflows.
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> [!NOTE]
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> Looking for the JS/TS library? Check out [LangChain.js](https://github.com/langchain-ai/langchainjs).
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## Why use LangChain?
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LangChain helps developers build applications powered by LLMs through a standard interface for models, embeddings, vector stores, and more.
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Use LangChain for:
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- **Real-time data augmentation**. Easily connect LLMs to diverse data sources and external/internal systems, drawing from LangChain’s vast library of integrations with model providers, tools, vector stores, retrievers, and more.
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- **Model interoperability**. Swap models in and out as your engineering team experiments to find the best choice for your application’s needs. As the industry frontier evolves, adapt quickly — LangChain’s abstractions keep you moving without losing momentum.
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## LangChain’s ecosystem
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While the LangChain framework can be used standalone, it also integrates seamlessly with any LangChain product, giving developers a full suite of tools when building LLM applications.
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To improve your LLM application development, pair LangChain with:
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- [LangSmith](https://www.langchain.com/langsmith) - Helpful for agent evals and observability. Debug poor-performing LLM app runs, evaluate agent trajectories, gain visibility in production, and improve performance over time.
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- [LangGraph](https://docs.langchain.com/oss/python/langgraph/overview) - Build agents that can reliably handle complex tasks with LangGraph, our low-level agent orchestration framework. LangGraph offers customizable architecture, long-term memory, and human-in-the-loop workflows — and is trusted in production by companies like LinkedIn, Uber, Klarna, and GitLab.
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- [LangGraph Platform](https://docs.langchain.com/langgraph-platform) - Deploy and scale agents effortlessly with a purpose-built deployment platform for long-running, stateful workflows. Discover, reuse, configure, and share agents across teams — and iterate quickly with visual prototyping in [LangGraph Studio](https://langchain-ai.github.io/langgraph/concepts/langgraph_studio).
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## Additional resources
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- [Learn](https://docs.langchain.com/oss/python/learn): Use cases, conceptual overviews, and more.
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- [API Reference](https://reference.langchain.com/python): Detailed reference on
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navigating base packages and integrations for LangChain.
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- [LangChain Forum](https://forum.langchain.com): Connect with the community and share all of your technical questions, ideas, and feedback.
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- [Chat LangChain](https://chat.langchain.com): Ask questions & chat with our documentation.
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