Claude outage September 10, 2026
Degraded functionality for Claude Cowork on Windows
Claude Claude Cowork was down for 99 h 21 min on September 10, 2026.
Claude recorded a major-impact incident affecting Claude Cowork on September 10, 2026. It ran for 99 h 21 min — 89× the archive median of 1 h 7 min.
- Started
- September 10, 2026, 15:54 UTC
- Resolved
- September 14, 2026, 19:14 UTC
- Duration
- 99 h 21 min
- Impact
- Major
What was affected?
How long did it last?
- September 10, 2026, 15:54 UTCidentifiedT+0
- September 14, 2026, 19:14 UTCresolvedT+99 h 21 min
Has this happened before?
This was incident 7 of 10 recorded in September 2026, totalling 109 h 47 min of reported disruption across all Claude components that month. Claude Cowork was affected by 17 other recorded incidents in the 30 days before this one started. The previous incident touching Claude Cowork started on September 3, 2026. These comparisons are drawn from our archive, which starts on July 14, 2026. See the full outage history.
Summarized by Claude Network from Claude Status. Last verified .