Anthropic incident: Degraded performance for Claude Fable 5.1

Affected components

• Claude API (api.anthropic.com)
• Claude Code
• Claude Cowork
• claude.ai

1. resolvedNov 8, 2026, 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.

2. monitoringNov 8, 2026, 08:39 UTC

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

3. investigatingNov 8, 2026, 08:28 UTC

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

What APIStatus.watch saw

• Nov 8, 2026, 08:31 UTCoperational → degraded
• Nov 8, 2026, 08:56 UTCdegraded → operational

Other services with incidents at the same time

Overlapping incidents aren't necessarily related.

• OVHcloud: [GRA6][Storage] - Instance Backup incident notificationMajor · Nov 5, 2026, 16:00 UTC
• Akamai: Edge Delivery issues between Indonesia and SingaporeMinor · Oct 25, 2026, 13:44 UTC
• Linode: Connectivity Issue between ID-CGK (Jakarta) and SG-SIN-2 (Singapore 2)Minor · Oct 25, 2026, 13:54 UTC
• Twilio: Voice Call Failures From Twilio Phone Numbers to GermanyMinor · Oct 27, 2026, 09:00 UTC
• Linode: Service Issue - US-Southeast (Atlanta)Minor · Oct 31, 2026, 17:49 UTC
• Twilio: Voice Call Failures from a Subset of Twilio Philippines Phone Numbers to Multiple Networks in PhilippinesMinor · Nov 2, 2026, 05:41 UTC
• Twilio: Media Streams Audio DelaysMinor · Nov 3, 2026, 01:29 UTC
• OVHcloud: [EU-WEST-PAR][Storage] - Object Storage incident notificationMinor · Nov 3, 2026, 09:43 UTC
• Cloudflare: Fedramp Customers have Delayed PurgesMinor · Nov 6, 2026, 17:47 UTC
• Twilio: SMS Delivery Receipt Delays from a Subset of Twilio Long Codes to Multiple Networks in ChileMinor · Nov 6, 2026, 21:21 UTC

How often does Anthropic have incidents?

Anthropic reported 43 incidents in the last 90 days, 25 of them major or critical. A typical incident lasted 1h 2m. See Anthropic's uptime and incident history