Elevated errors for Mythos 5, Fable 5, Opus 5 and Claude Haiku 4.5

Resolved

Yes — Claude had a problem on July 25, 2026, and Claude (Anthropic) has since marked it resolved. Claude (Anthropic)'s latest word: “This incident has been resolved.”

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Timeline

Started: 7/25/2026, 6:40:31 PM

Last update: 8/14/2026, 10:28:23 AM

Resolved: 7/25/2026, 7:44:32 PM

Affected: rwppv331jlwc, k8w3r06qmzrp, yyzkbfz2thpt, bpp5gb3hpjcl

Claude (Anthropic)'s official report →

Updates

resolved
This incident has been resolved.
7/25/2026, 7:44:32 PM
identified
The issue has been identified and a fix is being implemented.
7/25/2026, 6:44:12 PM
investigating
We are investigating elevated errors on requests to Claude Mythos 5, Claude Fable 5, and Claude Haiku 4.5. We will provide an update as soon as possible.
7/25/2026, 6:40:32 PM

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Elevated errors for Claude Sonnet 5.5 — resolved, 2d ago
Elevated errors for Claude Fable 5.1 — resolved, 4d ago
Elevated errors for Claude Sonnet 5.5 and other models — resolved, 4d ago

Is Claude down right now?All outage history →