Official Claude API incident · Oct 27, 2026
Major impact Claude API incident on Oct 27, 2026, lasting 41 min. Read the official timeline and compare it with community reports from the same day.
Official timeline
We are investigating elevated errors on requests to Claude Sonnet 5.5. We will provide an update as soon as possible.
The issue affecting claude.ai, the Claude API, Claude Code, and Claude Cowork has been resolved. Impact occurred from 07:42 PT / 14:42 UTC to 08:17 PT / 15:17 UTC.
Official incident details come from Anthropic Status. Community reports are voluntary submissions, not unique users or verified incident attribution. claudedumb.com is independent and not affiliated with Anthropic.