Elevated errors for Claude Mythos 5.1 and Claude Fable 5.1

Started: 2026-10-05 13:05 UTC
Last official update: 2026-10-05 13:21 UTC
Resolved: 2026-10-05 13:21 UTC
Published incident duration: 16 minutes.

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.

Read the full official incident ↗

MiniCrafts groups the provider's published notice by affected product. Unconfirmed scope stays unconfirmed. Published incident duration is not a measurement of downtime for every user.

What to do

Switch to ChatGPT, Gemini or a local model until Claude recovers.

Check current product status and troubleshoot · Usage limits and reset rules

Official update timeline

1. 2026-10-05 13:21 UTC · resolved

   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.

2. 2026-10-05 13:05 UTC · 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.

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