Incident

Elevated errors for Claude Sonnet 5.5

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.

resolved
Incident ID
#5fa26a2c
Impact
major
Components
anthropic

Updates

  1. identified Oct 27, 2026, 11:09 PM GMT+08:00

    We are investigating elevated errors on requests to Claude Sonnet 5.5. We will provide an update as soon as possible.

  2. resolved Oct 27, 2026, 11:50 PM GMT+08:00

    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.

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