ARCHIVED OFFICIAL INCIDENT

Intermittent error spikes for Claude Mythos 5.1 and Claude Fable 5.1

Claude · Last saved provider status: resolved

Current service report →
This is historical evidence.

The last saved event status is not the current service status. Source lists can be incomplete, and disappearance from a source does not confirm recovery. Open the current report or the official source for newer evidence.

Saved event details

Provider status
resolved
Provider impact
major
Provider record created
15 Sep 2026, 09:48:23 UTC
Provider record updated
15 Sep 2026, 11:14:44 UTC
Explicit provider start
15 Sep 2026, 09:48:23 UTC
Explicit provider end
15 Sep 2026, 11:14:44 UTC

Affected components reported by the provider

  • Claude Cowork bpp5gb3hpjcl
  • Claude API (api.anthropic.com) k8w3r06qmzrp
  • claude.ai rwppv331jlwc
  • Claude Code yyzkbfz2thpt

These associations describe this event’s reported scope. They do not establish current component availability or verified dependencies.

A record creation time is not necessarily an outage start. Unreported times remain unavailable. We do not calculate downtime from collection times.

Anthropic's complete Claude status report, including the app, API, Code and other listed components. An operational report does not verify any model or account.

Provider updates in saved revisions

Latest first. We show up to 100 distinct updates from the latest 20 saved content revisions. Revised wording at the same provider time is retained separately.

  1. resolved

    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.

    Seen in a saved revision at 06 Oct 2026, 13:58:39 UTC
  2. monitoring

    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.

    Seen in a saved revision at 06 Oct 2026, 13:58:39 UTC
  3. investigating

    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.

    Seen in a saved revision at 06 Oct 2026, 13:58:39 UTC
  4. investigating

    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.

    Seen in a saved revision at 06 Oct 2026, 13:58:39 UTC