Incident report · read from Anthropic's status page

Anthropic incident: Elevated errors for Claude Fable 5 and Claude Fable 5.1

Resolved after 36 m (24 Oct 2026, 05:16–05:53 UTC), impact major, affecting Claude Cowork, Claude API (api.anthropic.com), claude.ai and Claude Code.

Timeline

1. 24 Oct 2026 at 05:16 UTC investigating

   We are investigating elevated errors on requests to other Claude models. We will provide an update as soon as possible.

2. 24 Oct 2026 at 05:24 UTC identified

   We have identified the cause of elevated errors on requests to other Claude models and are working on a fix. We will provide an update as soon as possible.

3. 24 Oct 2026 at 05:40 UTC identified

   We have identified the cause of elevated errors on requests to other Claude models and are working on a fix. We will provide an update as soon as possible.

4. 24 Oct 2026 at 05:41 UTC monitoring

   A fix has been deployed for the issue affecting Claude services and we are monitoring for recovery.

5. 24 Oct 2026 at 05:53 UTC resolved

   The issue affecting Claude services has been resolved. Impact occurred from 22:00 PT on October 23 / 05:00 UTC on October 24 to 22:35 PT on October 23 / 05:35 UTC on October 24.

Affected components

• Claude Cowork: partial outage for 24 m
• Claude API (api.anthropic.com): partial outage for 8 m
• claude.ai: partial outage for 24 m
• Claude Code: partial outage for 24 m

What the crowd did

• 0 clicks, 3 zombies at their worst, 2 breaches, over 38 m — the siege in full

That is this site's own record of the crowd at Anthropic's gate, not anything Anthropic published.

Source

Anthropic's own report of this incident, on Anthropic's status page. This page is a record of Anthropic's own report; where the two disagree, theirs is right.

Last checked 30 Oct 2026 at 15:35 UTC.

Must Have AI is a parody and is not affiliated with, endorsed by or connected to OpenAI, Anthropic or Google. Every outage shown here is read from the provider's own public status page.