Resolved · lasted 7 h
Claude outage on September 11
Reports for Claude jumped to 137 an hour and stayed high for 7 h.
- Started
- 1:00 PM
- September 11, 2026 · UTC
- Back to normal
- 8:00 PM
- 7 h later
- Peak
- 137/hr
- 4× normal
- Anthropic’s incident
- 17 min
- Elevated errors for Claude Mythos 5.1 and Claude Fable 5.1
Reports during the outage
What Anthropic said
status.claude.comElevated errors for Claude Mythos 5.1 and Claude Fable 5.1
- Resolved · 2:37 PM
The issue affecting Claude services has been resolved. Impact occurred from 13:57 to 14:20 UTC
- Monitoring · 2:28 PM
A fix has been deployed for the issue affecting Claude services and we are monitoring for recovery.
- Monitoring · 2:28 PM
A fix has been deployed for Claude Mythos 5.1 and Claude Fable 5.1 and we are monitoring for recovery.
- Identified · 2:21 PM
We have identified the cause of elevated errors on requests to Claude Mythos 5.1 and Claude Fable 5.1 and are working on a fix. We will provide an update as soon as possible.
Anthropic posted its first update 1 h 21 min after reports started rising.
What people said
- Cyprien2:33 PM
claude ne répond plus a mes questions
1 comments during the outage
Is Claude down right now?
Live status, today’s reports and other past outages.