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All agents  /  Claude API  /  History  /  Aug 17, 2026

Claude API outage on Aug 17, 2026: degraded performance for Claude Opus 5, Claude Sonnet 5

Resolved after 1 h 33 min.

13:56 UTC to 15:29 UTC your time. Anthropic: “Degraded performance for Claude Opus 5, Claude Sonnet 5.” 0 reports here during the incident.

Claude APIUpRight now Claude API is up. See live status

Reports during the incident

Every 15 minutes, 12:45 UTC to 16:30 UTC. Grey: normal. Red line: official incident.
12:45 UTC13:56 UTC15:29 UTC16:30 UTC

What people reported

0 reports during the incident

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Anthropic's updates

Quoted from status.claude.com

  1. 13:56 UTC

    Investigating

    We are investigating elevated errors on requests to Claude Opus 5. We will provide an update as soon as possible.

  2. 14:25 UTC

    Investigating

    Claude Opus 5 is operational. Claude Sonnet 5 is degraded. We are investigating.

  3. 14:39 UTC

    Monitoring

    A fix has been implemented and we are monitoring the results.

  4. 15:29 UTC

    Resolved

    This incident has been resolved.

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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