ARCHIVED OFFICIAL INCIDENT

Elevated errors for multiple models

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
03 Sep 2026, 13:26:04 UTC
Provider record updated
03 Sep 2026, 16:23:12 UTC
Explicit provider start
03 Sep 2026, 13:26:04 UTC
Explicit provider end
03 Sep 2026, 16:23:12 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

    The issue affecting Claude Mythos 5.1, Claude Fable 5.1, and Claude Opus 5 has been resolved. Impact has ended as of 9:16 PT / 16:16 UTC.

    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, Claude Fable 5.1, and Claude Opus 5 and we are monitoring for recovery.

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

    The only affected models right now are Opus 4.8 and Opus 5. The rest of the models have recovered to baseline error rate.

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

    We are continuing to work on a fix for this issue.

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

    An exhaustive list of affected models: Mythos/Fable 5.1, Mythos/Fable 5, Opus 5, Opus 4.8, Opus 4.6.

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

    We have identified the cause of elevated errors on requests to Claude Mythos 5.1, Claude Fable 5.1, and Claude Opus 5 and are working on a fix. We will provide an update as soon as possible.

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

    We are investigating elevated errors on requests to Claude Mythos 5.1, Claude Fable 5.1, and Claude Opus 5. We will provide an update as soon as possible.

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