Install LangChain

Alpha Notice: These docs cover the v1-alpha release. Content is incomplete and subject to change.

For the latest stable version, see the v0 LangChain Python or LangChain JavaScript docs.

To install the core LangChain package:

npm

npm install langchain@next

LangChain provides integrations to hundreds of LLMs and thousands of other integrations. To avoid package bloat, these live in independent provider packages. For example:

npm

# Installing the OpenAI integration
npm install @langchain/openai@next
# Installing the Anthropic integration
npm install @langchain/anthropic@next

See the Integrations tab for a full list of available integrations.