Elevated errors for Claude Mythos 5.1 and Claude Fable 5.1 — Anthropic Incident Timeline & Status

Elevated errors for Claude Mythos 5.1 and Claude Fable 5.1

Started

Oct 5, 1:05 PM UTC

Resolved

Oct 5, 1:21 PM UTC

Duration

15 minutes

Resolvedmajor impactVendor link

Update timeline

ResolvedOct 5, 1:21 PM

The issue affecting Claude Mythos 5.1 and Claude Fable 5.1 has been resolved. Impact occurred from 05:40 PT / 12:40 UTC to 06:10 PT / 13:10 UTC.

InvestigatingOct 5, 1:05 PM

We are investigating elevated errors on requests to Claude Mythos 5.1 and Claude Fable 5.1. We will provide an update as soon as possible.