Claude (Anthropic) · 31d ago

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

Name: Elevated errors for Claude Mythos 5, Claude Fable 5, and Claude Sonnet 5
Start: 2026-08-13T14:33:45.150Z
End: 2026-08-13T16:08:35.730Z

Resolved

Timeline

Started: Aug 13, 2026, 2:33 PM UTC

Last update: Aug 14, 2026, 10:28 AM UTC

Resolved: Aug 13, 2026, 4:08 PM UTC

Affected: rwppv331jlwc, k8w3r06qmzrp, yyzkbfz2thpt, bpp5gb3hpjcl

Claude (Anthropic)'s official report →

Updates

resolved
The issue affecting Claude Mythos 5 and Claude Fable 5 has been resolved.
Aug 13, 2026, 4:08 PM UTC
investigating
We are investigating elevated errors on requests to Claude Mythos 5 and Claude Fable 5. We will provide an update as soon as possible.
Aug 13, 2026, 3:44 PM UTC
investigating
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.
Aug 13, 2026, 2:33 PM UTC

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