Partial outageAnthropic ・ September 11, 2026
Degraded functionality for Claude Cowork on Windows
A record of the Anthropic incident on September 11, 2026 (Japan time): start time, duration and severity, plus current status, what to do, and alternatives.
Started
Sep 11, 2026, 12:54 AM
Resolved
ongoing
Duration
59h 22m
Impact
Partial outage
Other providers down at the same time
1 other incident(s) at different providers overlapped with this one. It may not have been limited to a single service — several providers were degraded at once.
- ElevenLabsEU Residency - Conversation history not showing for recent calls
Derived from our own archive of official status pages across 13 providers. Items lasting more than 24 hours and unresolved items are excluded, as they would misrepresent the moment.
Current status
Anthropic is operating normally now. This incident has been resolved.
See current Anthropic status →What you can do during an outage
Source: Anthropic's official status page.
Other Anthropic incidents
- Elevated errors for Claude Mythos 5.1 and Claude Fable 5.1September 11, 2026
- Elevated latency on the Claude API for some usersSeptember 11, 2026
- Elevated errors for multiple modelsSeptember 3, 2026
- Elevated errors for Claude Sonnet 5September 3, 2026
- Elevated errors for Claude Sonnet 5September 3, 2026