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All agents  /  Claude Code  /  History  /  Oct 23, 2026

Claude Code outage on Oct 23, 2026: elevated errors for Claude Fable 5.1, Sonnet 5.5, and Haiku 5.5

Resolved after 34 min.

23:37 UTC to 00:11 UTC your time. Anthropic: “Elevated errors for Claude Fable 5.1, Sonnet 5.5, and Haiku 5.5.” 0 reports here during the incident.

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Reports during the incident

Every 15 minutes, 22:30 UTC to 01:15 UTC. Grey: normal. Red line: official incident.
22:30 UTC23:37 UTC00:11 UTC01:15 UTC

What people reported

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Anthropic's updates

Quoted from status.claude.com

  1. 23:37 UTC

    Investigating

    We are investigating elevated errors on requests to Claude Fable 5.1. We will provide an update as soon as possible.

  2. 23:39 UTC

    Identified

    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.

  3. 23:54 UTC

    Monitoring

    We are seeing success rates return to normal for all affected models, and are continuing to monitor to ensure no further issues.

  4. 00:11 UTC

    Resolved

    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.

Other Claude Code incidents

Nov 826 minDegraded performance for Claude Fable 5.1Details
Oct 283 h 46 minElevated errors affecting the Google Calendar connectorDetails
Oct 281 h 49 minElevated errors affecting the Gmail connectorDetails
All Claude Code incidents

Other agents

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