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All agents  /  Claude API  /  History  /  Oct 25, 2026

Claude API outage on Oct 25, 2026: elevated errors for Claude Sonnet 5.5 and other models

Resolved after 1 h 39 min.

06:14 UTC to 07:53 UTC your time. Anthropic: “Elevated errors for Claude Sonnet 5.5 and other models.” 0 reports here during the incident.

Claude APIUpRight now Claude API is up. See live status

Reports during the incident

Every 15 minutes, 05:00 UTC to 09:00 UTC. Grey: normal. Red line: official incident.
05:00 UTC06:14 UTC07:53 UTC09:00 UTC

What people reported

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Anthropic's updates

Quoted from status.claude.com

  1. 06:14 UTC

    Investigating

    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.

  2. 06:27 UTC

    Identified

    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.

  3. 06:35 UTC

    Monitoring

    A fix has been deployed for the issue affecting Claude services and we are monitoring for recovery.

  4. 07:53 UTC

    Resolved

    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.

Other Claude API incidents

Nov 826 minDegraded performance for Claude Fable 5.1Details
Oct 2741 minElevated errors for Claude Sonnet 5.5Details
Oct 2742 minElevated errors for Claude Sonnet 5.5Details
All Claude API incidents

Other agents

Claude CodeUpCodexUpCursor IDEUpGitHub CopilotUpGemini CLIUpOpenAI APIUpGitHubUp

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