Incidentsby IbisElevated errors for Claude Fable 5.1, Sonnet 5.5, and Haiku 5.5
Oct 23, 23:37 UTCOct 24, 00:11 UTC
Duration
34m
Impact
Critical
Root cause
Not disclosed
Anthropic, 90 days
56 incidents
Affected
claude.aiClaude API (api.anthropic.com)Claude CodeClaude Cowork
Final update
The issue affecting Claude models has been resolved. Impact occurred from 16:28 PT / 23:28 UTC on October 23 to 16:59 PT / 23:59 UTC on October 23.
Timeline
- Resolved · Oct 24, 00:11 UTC
The issue affecting Claude models has been resolved. Impact occurred from 16:28 PT / 23:28 UTC on October 23 to 16:59 PT / 23:59 UTC on October 23.
- Monitoring · Oct 23, 23:54 UTC
We are seeing success rates return to normal for all affected models, and are continuing to monitor to ensure no further issues.
- Identified · Oct 23, 23:39 UTC
We have identified the cause of elevated errors on requests to Claude Fable 5.1, Sonnet 5.5, and Haiku 5.5, as well as fast mode requests to Opus 5.5 and are working on a fix. We will provide an update as soon as possible.
- Investigating · Oct 23, 23:37 UTC
We are investigating elevated errors on requests to Claude Fable 5.1. We will provide an update as soon as possible.