Anthropic outage — September 2, 2026
Elevated errors for Claude Sonnet 5
Anthropic’s Claude.ai was disrupted for 51m on September 2, 2026.
Key facts
| Detected | September 2, 2026 · 21:17 UTC |
| Confirmed | 21:17 UTC |
| Resolved | 22:09 UTC |
| Duration | 51m |
| Service | Claude.ai |
| Official record | https://stspg.io/9dgzwz3ymz42 |
Timeline
- 21:17Z
Detected · Official
Reported directly on ANTHROPIC's official status page — no earlier independent (crowd / dependency / measurement) signal. - 22:09Z
Resolved
Signal volume fell back below the threshold; the event was closed.
Evidence
| Official status feed | degraded (changed 21:17 UTC) |
| Anomaly score | +0.00σ above this cell's own baseline |
| Engine confidence | 95% |
Outage-related signals per hour over the live window, oldest → newest (peak 1).
How this was detected
Confirmed by ANTHROPIC's official status page — no independent (crowd / dependency / measurement) corroboration.