Anthropic Release notes and new features

San Francisco, US · 233 releases · 10 this month

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Anthropic releases

November 2026 digest

2 releases

Claude Platform

Claude Opus 4.1 is retired on the Claude API

All requests to claude-opus-4-1-20250805 now return an error. Anthropic recommends upgrading to Claude Opus 5; researchers can request continued access through the External Researcher Access Program.

Claude Opus 4.1 is retired on the Claude APIDeprecation
Inference hooksBeta

DeprecationAug 5

About and activity

Anthropic, PBC is an American artificial intelligence (AI) public benefit corporation headquartered in San Francisco, California. Its flagship product is Claude, a series of proprietary large language models (LLMs).

Company profile

Releases per month

11Jun 29Jul 31Aug 73Sep 79Oct 10Nov

Official release-notes pages 10

Release-notes page	Site	Feed
Claude apps release notes support.claude.com	support.claude.com	None
Claude Code changelog github.com	github.com	None
Claude Code changelog (docs) code.claude.com	code.claude.com	None
Claude Code releases github.com	github.com	RSS
Claude Platform release notes platform.claude.com	platform.claude.com	None
Claude Agent SDK (Python) releases github.com	github.com	RSS
Claude Agent SDK (TS) releases github.com	github.com	RSS
Python SDK releases github.com	github.com	RSS
System prompts release notes platform.claude.com	platform.claude.com	None
TypeScript SDK releases github.com	github.com	RSS