Install LangChain

To install the LangChain package:

npm install langchain @langchain/core
# Requires Node.js 20+

LangChain provides integrations to hundreds of LLMs and thousands of other integrations. These live in independent provider packages. For example:

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

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

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