langchain/libs/partners/anthropic/README.md

# langchain-anthropic

This package contains the LangChain integration for Anthropic's generative models.

## Installation

`pip install -U langchain-anthropic`

## Chat Models

| API Model Name     | Model Family   |
| ------------------ | -------------- |
| claude-instant-1.2 | Claude Instant |
| claude-2.1         | Claude         |
| claude-2.0         | Claude         |

To use, you should have an Anthropic API key configured. Initialize the model as:

```
from langchain_anthropic import ChatAnthropicMessages
from langchain_core.messages import AIMessage, HumanMessage

model = ChatAnthropicMessages(model="claude-2.1", temperature=0, max_tokens=1024)
```

### Define the input message

`message = HumanMessage(content="What is the capital of France?")`

### Generate a response using the model

`response = model.invoke([message])`

For a more detailed walkthrough see [here](https://python.langchain.com/docs/integrations/chat/anthropic).
anthropic: beta messages integration (#14928) 9 months ago			`# langchain-anthropic`
docs: langchain-anthropic README updates (#17684) # PR Message - Description: This PR adds a README file for the Anthropic API in the `libs/partners` folder of this repository. The README includes: - A brief description of the Anthropic package - Installation & API instructions - Usage examples - Issue: [17545](https://github.com/langchain-ai/langchain/issues/17545) - Dependencies: None Additional notes: This change only affects the docs package and does not introduce any new dependencies. --------- Co-authored-by: Bagatur <baskaryan@gmail.com> 7 months ago
			`This package contains the LangChain integration for Anthropic's generative models.`

			`## Installation`

			`pip install -U langchain-anthropic`

			`## Chat Models`

			`\| API Model Name \| Model Family \|`
			`\| ------------------ \| -------------- \|`
			`\| claude-instant-1.2 \| Claude Instant \|`
			`\| claude-2.1 \| Claude \|`
			`\| claude-2.0 \| Claude \|`

			`To use, you should have an Anthropic API key configured. Initialize the model as:`

			```
			`from langchain_anthropic import ChatAnthropicMessages`
			`from langchain_core.messages import AIMessage, HumanMessage`

			`model = ChatAnthropicMessages(model="claude-2.1", temperature=0, max_tokens=1024)`
			```

			`### Define the input message`

			`message = HumanMessage(content="What is the capital of France?")`

			`### Generate a response using the model`

			`response = model.invoke([message])`

			`For a more detailed walkthrough see [here](https://python.langchain.com/docs/integrations/chat/anthropic).`