langchain-anthropic
Integration package connecting Claude (Anthropic) APIs and LangChain
Decision gist · record as of 2026-08-14
Yes. This is a production-stable, actively maintained integration with low install friction, no security issues, and permissive licensing. Install it if you're already using LangChain and want to use Claude; it's the standard way to do so within the LangChain ecosystem.AI-flagged interpretation of the facts on this page — verify before relying
Before you install
- Requires Python 3.10 or later; you must also have an Anthropic API key set in your environment to authenticate requests.
- Low friction installation with a pure-Python wheel.
- Active maintenance with a release 1 day old and continuous commits.
License · maintenance · safety
MIT (permissive) — MIT license is permissive; you can use, modify, and distribute this package with minimal restrictions, making it suitable for both open-source and commercial projects.
last release 2026-08-13 (1 days) · last repo commit 2026-08-14 · 144,196 stars
0 known vulnerabilities (OSV.dev, 2026-08-14) · 23,551,909 downloads/mo, #940 on PyPI
Alternatives
Verify before relying
pip install langchain-anthropic
from langchain_anthropic import ChatAnthropic
model = ChatAnthropic()
response = model.invoke("Hello, world!")- Which specific Claude model versions are supported by this release.
- Whether streaming, vision, or tool-use features are included in this integration.
- Performance characteristics or rate-limit handling compared to direct anthropic SDK use.
- Exact model parameter names and defaults for ChatAnthropic instantiation.
What it is and what it does
langchain-anthropic is a bridge between LangChain and Anthropic's Claude models. It wraps Claude's API behind LangChain's standard interfaces, so you can use Claude as a language model within LangChain applications without writing provider-specific code. The package handles authentication, request formatting, and response parsing for you.
It's designed for developers building LangChain-based AI systems who want to use Claude as their model backbone. You install it alongside langchain-core and anthropic, then instantiate a ChatAnthropic object and call it like any other LangChain model. The package is actively maintained, supports Python 3.10 through 3.14, and has no known security vulnerabilities.
Use it for
- Build a LangChain agent or chain that uses Claude for reasoning and text generation without writing anthropic SDK code directly.
- Swap Claude in and out of a LangChain application by changing a single model parameter, keeping the rest of your pipeline unchanged.
- Integrate Claude into LangChain's retrieval-augmented generation workflows for question-answering over documents.
- Use Claude within LangChain's tool-calling and function-execution patterns for structured task automation.
- Prototype multi-model LangChain applications where Claude is one of several selectable providers.
Worth the install?
AI-flagged interpretation of the facts on this page. Verify before relying on it.
Yes.
This is a production-stable, actively maintained integration with low install friction, no security issues, and permissive licensing. Install it if you're already using LangChain and want to use Claude; it's the standard way to do so within the LangChain ecosystem.
Install
langchain-anthropic on PyPI
Before you install
Low friction installation with a pure-Python wheel. Active maintenance with a release 1 day old and continuous commits. Depends on anthropic, langchain-core, and pydantic—all stable, widely-used libraries.
Requires Python 3.10 or later; you must also have an Anthropic API key set in your environment to authenticate requests.
License in practice
MIT license is permissive; you can use, modify, and distribute this package with minimal restrictions, making it suitable for both open-source and commercial projects.
Quickstart
pip install langchain-anthropic
from langchain_anthropic import ChatAnthropic
model = ChatAnthropic()
response = model.invoke("Hello, world!")Verify before relying
- Which specific Claude model versions are supported by this release.
- Whether streaming, vision, or tool-use features are included in this integration.
- Performance characteristics or rate-limit handling compared to direct anthropic SDK use.
- Exact model parameter names and defaults for ChatAnthropic instantiation.
Package facts
| License | MIT permissive |
| Python support | Supports the current Python release <4.0.0,>=3.10.0 |
| Install friction | Low. Pure-Python wheel |
| Runtime dependencies | 3 packagesanthropiclangchain-corepydantic |
| Maintenance | Actively maintained 1 days since the last release |
| Last repo commit | |
| First released | |
| Downloads | 23,551,909 / month, #940 on PyPI 30-day window, as of 2026-08-14 |
| Known vulnerabilities | None known OSV.dev, checked 2026-08-14 |
| Classifiers | Development Status :: 5 - Production/StableIntended Audience :: DevelopersLicense :: OSI Approved :: MIT LicenseProgramming Language :: Python :: 3Programming Language :: Python :: 3.10Programming Language :: Python :: 3.11Programming Language :: Python :: 3.12Programming Language :: Python :: 3.13Programming Language :: Python :: 3.14Topic :: Scientific/Engineering :: Artificial Intelligence |
Evidence: langchain_anthropic-1.5.6-py3-none-any.whl
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See also langchain-openai · langchain-mistralai · langchain-xai · langchain-perplexity · langchain-groq · langchain-deepseek · langchain-google-vertexai · llm-anthropic · langchain-fireworks