Anthropic: Degraded performance for Claude Fable 5.1
Affected components: claude.aiClaude API - api.anthropic.comClaude CodeClaude Cowork
Timeline of updates
- investigating
We are investigating elevated errors on requests to Claude Fable 5.1. We will provide an update as soon as possible.
- monitoring
A fix has been deployed for Claude Fable 5.1 and we are monitoring for recovery.
- resolved
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.
Changes Rewindex caught on this incident
- Incident updated: Degraded performance for Claude Fable 5.1
- Incident updated: Degraded performance for Claude Fable 5.1
Archive proof
Rewindex commits each version of an incident it captures to a daily checkpoint, chains it to the day before, and has the checkpoint timestamped by FreeTSA and DigiCert.
How the archive is checked, and what it cannot prove.
Rewindex captured this after the last checkpoint; the next run () commits it.
Impact, status and times are the vendor’s own, as last archived. View on status.claude.com (opens in new tab).
Cite this
Status incident (vendor impact label: minor) posted by Anthropic, started 2026-11-08 08:28 UTC, resolved after 26 min, 3 update(s); edited after publishing.
- Title
- Degraded performance for Claude Fable 5.1
- Vendor
- Anthropic
- Date
- URL
- https://rewindex.com/company/anthropic/incidents/kw2lxj1th04c
Anthropic profileRecent Anthropic incidentsAll outages on November 8, 2026Anthropic in November 2026MarkdownJSON