You are viewing the v1 docs for LangChain, which is currently under active development. Learn more.
To install the core LangChain package 
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. Common packages: 
# Installing the OpenAI integration
npm install @langchain/openai@next
# Installing the Anthropic integration
npm install @langchain/anthropic@next
See the integrations page for a full list of available integrations.