Anthropic Release notes and new features

San Francisco, US · 233 releases · 10 this month

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Anthropic releases

November 2026 digest

6 releases

Claude Platform

Fast mode is out of research preview for Claude Opus 5.5, and you no longer need to request access

Fast mode is out of research preview for Claude Opus 5.5, and you no longer need to request access. Requests to Claude Opus 5.5 no longer require the fast-mode-2026-02-01 beta header, and requests that still send it keep working. Claude Opus 5.5 now has a default fast mode rate limit in the Start, Build, and Scale usage tiers.

PreviewOct 15

Claude Agent SDK

Claude Agent SDK 0.2.168

Internal/Other Changes Updated bundled Claude CLI to version 2.1.301 PyPI: https://pypi.org/project/claude-agent-sdk/0.2.168/ bash pip install claude-agent-sdk==0.2.168

UpdateOct 15

Source ↗

Claude Code

Claude Code 2.1.301

- Added CLAUDE_CODE_RETRY_WATCHDOG_MAX_USAGE_LIMIT_WAIT_MS so unattended retry mode (CLAUDE_CODE_RETRY_WATCHDOG) ends a request at a usage limit that resets too far away instead of waiting Added OpenTelemetry tracing guidance to the claude-api skill, including setting up trace destinations with the ant CLI Added the % motion to vim mode: jump to the...

UpdateOct 15

Source ↗

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