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## PR title langchain_anthropic[patch]: Invoke callback prior to yielding ## PR message - Description: Invoke callback prior to yielding token in _stream and _astream methods for anthropic. - Issue: https://github.com/langchain-ai/langchain/issues/16913 - Dependencies: None - Twitter handle: None
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.