Degraded performance for Claude Fable 5.1

Incident Report for Claude

Monitoring

A fix has been deployed for Claude Fable 5.1 and we are monitoring for recovery.
Posted Nov 08, 2026 - 08:39 UTC

Investigating

We are investigating elevated errors on requests to Claude Fable 5.1. We will provide an update as soon as possible.
Posted Nov 08, 2026 - 08:28 UTC
This incident affects: claude.ai, Claude API (api.anthropic.com), Claude Code, and Claude Cowork.