Install LangChain

To install the LangChain package:

pip install -U langchain
# Requires Python 3.10+

uv add langchain
# Requires Python 3.10+

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

# Installing the OpenAI integration
pip install -U langchain-openai
 
# Installing the Anthropic integration
pip install -U langchain-anthropic

# Installing the OpenAI integration
uv add langchain-openai
 
# Installing the Anthropic integration
uv add langchain-anthropic

See the Integrations tab (opens in a new tab) for a full list of available integrations.

Now that you have LangChain installed, you can get started by following the Quickstart guide (opens in a new tab).

Set up LangSmith (opens in a new tab) tracing to debug your first LangChain app. Follow the tracing quickstart to get started. We recommend you also set up LangSmith Engine which monitors your traces, detects issues, and proposes fixes.