Outage in Claude
Elevated errors for Claude Sonnet 5.5
Resolved MajorIncident Report
Summary AI Generated
Claude experienced elevated errors on requests to Claude Sonnet 5.5 on October 27, 2026, affecting claude.ai, the Claude API, Claude Code, and Claude Cowork. The incident lasted approximately 40 minutes, from 07:42 to 08:17 PT, before being fully resolved.
We are investigating elevated errors on requests to Claude Sonnet 5.5. We will provide an update as soon as possible.
Components affected
Claude claude.ai Claude api.anthropic.comLatest Updates ( sorted recent to last )
RESOLVED
1 day ago - at 10/27/2026 03:50PM
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.
IDENTIFIED
1 day ago - at 10/27/2026 03:09PM
We are investigating elevated errors on requests to Claude Sonnet 5.5. We will provide an update as soon as possible.
Latest Claude outages
Elevated errors affecting the Google Calendar connector - about 16 hours ago
Elevated errors affecting the Gmail connector - 1 day ago
Elevated errors for Claude Sonnet 5.5 - 2 days ago
Elevated errors for Claude Fable 5.1 - 4 days ago
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