Degraded performance for Claude Fable 5.1

Anthropic resolved an incident of elevated request errors on Claude Fable 5.1 that degraded claude.ai, the Claude API at api.anthropic.com, Claude Code, and Claude Cowork, with impact lasting from 00:18 PT to 00:32 PT on Nov 8, 2026. Anthropic said a fix had been deployed and it was monitoring for recovery as of 08:39 UTC, and confirmed the issue resolved at 08:54 UTC.

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. Posted Nov 08, 2026 - 08:54 UTC 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 affected: claude.ai, Claude API api.anthropic.com , Claude Code, and Claude Cowork. Subscribe to updates for Degraded performance for Claude Fable 5.1 via email and/or text message. You'll receive email notifications when incidents are updated, and text message notifications whenever Claude creates or resolves an incident.