Anthropic incident
Elevated errors for Claude Sonnet 5.5 and other models
Resolved after 1 hour 39 minutes, affecting claude.ai and Claude API (api.anthropic.com) and 1 more, on October 25, 2026.
The issue affecting Claude services has been resolved. Impact occurred from 23:05 PT on October 24 / 06:05 UTC on October 25 to 23:35 PT on October 24 / 06:35 UTC on October 25.
Affected components
Update timeline
- investigating Oct 25, 2026, 06:14 AM UTC
We are investigating elevated errors on requests to Claude Mythos 5.1, Claude Fable 5.1, Claude Opus 5.5, Claude Sonnet 5.5, and Claude Haiku 5.5. We will provide an update as soon as possible.
- identified Oct 25, 2026, 06:27 AM UTC
We have identified the cause of elevated errors on requests to Claude Sonnet 5.5 and are working on a fix. We will provide an update as soon as possible.
- monitoring Oct 25, 2026, 06:35 AM UTC
A fix has been deployed for the issue affecting Claude services and we are monitoring for recovery.
- resolved Oct 25, 2026, 07:53 AM UTC
The issue affecting Claude services has been resolved. Impact occurred from 23:05 PT on October 24 / 06:05 UTC on October 25 to 23:35 PT on October 24 / 06:35 UTC on October 25.
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