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Anthropic is an AI safety and research company, and is the creator of Claude. This page covers all integrations between Anthropic models and LangChain.

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Installation and Setup

To use Anthropic models, you need to install a python package: 
pip install -U langchain-anthropic
You need to set the ANTHROPIC_API_KEY environment variable. You can get an Anthropic API key here

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Chat Models

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ChatAnthropic

See a usage example. 
from langchain_anthropic import ChatAnthropic

model = ChatAnthropic(model='claude-3-opus-20240229')

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LLMs

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[Legacy] AnthropicLLM

NOTE: AnthropicLLM only supports legacy Claude 2 models. To use the newest Claude 3 models, please use ChatAnthropic instead. See a usage example. 
from langchain_anthropic import AnthropicLLM

model = AnthropicLLM(model='claude-2.1')