Degraded performance for Claude Fable 5.1

Summary

Degraded performance for Claude Fable 5.1

The issue affecting claude.ai, the Claude API, Claude Code, and Claude Cowork has been resolved. Impact occurred from 00:18 PT / 08:18 UTC on Nov 8 to 00:32 PT / 08:32 UTC on Nov 8.

• Started

  Nov 8, 2026 · 8:28 AM

• Resolved

  Nov 8, 2026 · 8:54 AM

• Duration

  26m

• Severity

  Minor

• ◐

  Investigating

  Nov 8 · 8:28 AM Claude

  We are investigating elevated errors on requests to Claude Fable 5.1. We will provide an update as soon as possible.

• ◉

  Monitoring

  Nov 8 · 8:39 AM Claude

  A fix has been deployed for Claude Fable 5.1 and we are monitoring for recovery.

• ✓

  Resolved

  Nov 8 · 8:54 AM Claude

  The issue affecting claude.ai, the Claude API, Claude Code, and Claude Cowork has been resolved. Impact occurred from 00:18 PT / 08:18 UTC on Nov 8 to 00:32 PT / 08:32 UTC on Nov 8.