News · Claude
Claude Developers: Claude API version 2026-10-21 is out, the first new version since 2023; 2023-06-01 is not deprecated
Posted on X by Claude Developers (@ClaudeDevs) on 21 October 2026. The headline is our summary; the post itself is quoted below.
Claude Developers@ClaudeDevs ·
API version 2026-10-21 is now available. The Claude API has evolved a lot, but this is our first official version release since 2023. We plan…
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Context
- Claude Code 2.1.307Released the same day (UTC). Added /claude-api api-version to move Claude API code to API version 2026-10-21 · and more
- Claude Code 2.1.306Released the same day (UTC). Fixed claude -p inside cloud sessions reporting "Not logged in" when started without the session's environment variables · and more
- AI news in October 2026The month in one page: posts, releases, resets and blog posts.
- All Claude newsSelected posts, newest first.
Also tracked: Claude news · Claude resets · Claude Code release notes · Blog