Major impactResolvedAI/ML

Claude outage: Elevated errors for Claude Mythos 5, Claude Fable 5, and Claude Sonnet 5

Claude reported this major-impact incident on its official status page on Aug 13, 2026, 14:33 UTC. It was resolved after 1h 35m.

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Aug 13, 2026, 14:33 UTC
started
Aug 13, 2026, 16:08 UTC
resolved
1h 35m
duration
Major
impact

Affected components

  • Claude API (api.anthropic.com)
  • Claude Code
  • Claude Cowork
  • claude.ai

Timeline

updates from Claude's status page ↗
  1. resolvedAug 13, 2026, 16:08 UTC

    The issue affecting Claude Mythos 5 and Claude Fable 5 has been resolved.

  2. investigatingAug 13, 2026, 15:44 UTC

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

  3. investigatingAug 13, 2026, 14:33 UTC

    We are investigating elevated errors on requests to Claude Mythos 5, Claude Fable 5, and Claude Sonnet 5. We will provide an update as soon as possible.

What APIStatus.watch saw

Our 5-minute checks didn't record a change in Claude's overall status around this incident. Smaller or regional incidents often leave a provider's overall status green.

Other services with incidents at the same time

Overlapping incidents aren't necessarily related.

How often does Claude have incidents?

Claude reported 85 incidents in the last 90 days, 32 of them major or critical. A typical incident lasted 1h 7m. See Claude's uptime and incident history

← Previous: Degraded performance for multiple models (Aug 12, 2026)Next: Service disruption on Claude Code on the web and related services (Aug 14, 2026) →
Claude outage on Aug 13, 2026: Elevated errors for Claude Mythos 5, Claude Fable 5, and Claude Sonnet 5 · APIStatus.watch