anthropic

Anthropic Python SDK by Anthropic

The official Python library for the anthropic API

Live Registry Versionv2.3.0Previous: v2.2.0Published 2026-10-23

Stability Grade

B (78/100)

90-Day Velocity

30 releases

High release cadence

Dependencies

17 direct

PYPI manifest

License

Apache-2.0

Verified on PYPI

Recommended Exact Pin: pip install "anthropic==2.3.0"

PYPI Registry ->GitHub Repo ->

TL;DR Verdict & Quick Citation Summary (2026-10-24)Source: AgentBreakWatch Live PYPI Index

Anthropic Python SDK (anthropic) is currently at v2.3.0 on PYPI (published 2026-10-23), with a 90-day stability score of 78/100 (B) and MEDIUM schema drift risk across 30 releases in the past 90 days. v2.x drops Python 3.9 support, requires typed thinking blocks on multi-turn tool loops, and updates streaming citation events. Production teams should pin pip install "anthropic==2.3.0" rather than using unpinned @latest tags.

Breaking Changes & Tool Schema Drift Analysis

v2.x drops Python 3.9 support, requires typed thinking blocks on multi-turn tool loops, and updates streaming citation events.

Watched Exports / MCP Tool Signatures:

AnthropicAsyncAnthropicmessages.stream

Before (Deprecated / Unpinned Pattern)

client.beta.prompt_caching.messages.create(model="claude-3-5-sonnet-20241022", messages=msgs)

After (Verified v2.3.0 Pattern)

client.messages.create(model="claude-sonnet-4-5", max_tokens=4096, messages=msgs)

Frequently Asked Questions: anthropic

What is the latest version of anthropic on PYPI?

As of 2026-10-24, the latest stable version of anthropic (Anthropic Python SDK by Anthropic) on PYPI is v2.3.0, published on 2026-10-23. It has shipped 30 releases in the last 90 days.

Does anthropic v2.3.0 have breaking changes or MCP schema drift risk?

anthropic currently carries a MEDIUM schema drift risk rating with a Stability Score of 78/100 (Grade B). v2.x drops Python 3.9 support, requires typed thinking blocks on multi-turn tool loops, and updates streaming citation events.

How do I safely pin anthropic in production?

Avoid unpinned @latest tags in production agent configs. Pin the exact verified version using `pip install "anthropic==2.3.0"` and monitor Anthropic, AsyncAnthropic, messages.stream for parameter or schema changes.

30-Min Registry & Schema Poller

Get Instant Breaking-Change Alerts for anthropic

We poll PYPI and anthropics/anthropic-sdk-python every 30 minutes. Get an email with the exact diff when anthropic ships a breaking release beyond v2.3.0.