Incident report · read from Anthropic's status page

Anthropic incident: Degraded performance for Claude Fable 5

Resolved after 40 m (21 Oct 2026, 19:49–20:29 UTC), impact minor, affecting Claude Cowork, Claude API (api.anthropic.com), claude.ai and Claude Code.

Timeline

1. 21 Oct 2026 at 19:49 UTC investigating

   We are investigating elevated errors on requests to Claude Fable 5. We will provide an update as soon as possible.

2. 21 Oct 2026 at 20:29 UTC resolved

   The issue affecting other Claude models has been resolved.

Affected components

• Claude Cowork: degraded for 40 m
• Claude API (api.anthropic.com): degraded for 40 m
• claude.ai: degraded for 40 m
• Claude Code: degraded for 40 m

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 16:27 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.