aiAI Status Monitor

Intermittent error spikes for Claude Mythos 5.1 and Claude Fable 5.1

Partial outageResolved · started Sep 15, 2026, 9:48 AM UTC (19d ago)

This incident affects Claude. Source: official vendor status feed.

Timeline

  1. Sep 15, 2026, 11:14 AM UTC

    A fix has been deployed for Claude Mythos 5.1 and Claude Fable 5.1 and we are monitoring to ensure it has resolved the issue.

  2. Sep 15, 2026, 10:50 AM UTC

    A fix has been deployed for Claude Mythos 5.1 and Claude Fable 5.1 and we are monitoring to ensure it has resolved the issue.

  3. Sep 15, 2026, 9:52 AM UTC

    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.

  4. Sep 15, 2026, 9:48 AM UTC

    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.