Claude API disruption on 25 September 2026
Claude API from Montreal: degraded checks; 2026-09-25 17:00 UTC to 2026-09-25 19:00 UTC: peak first visible token 5.68 s vs a usual 1.55 s.
- What our checks saw
- Degraded
- Cities affected
- Montreal
- When
- to
- How long
- 2 hours
- Slowest check
- 5.68 s, usually 1.55 s
- Anthropic's status page
- Open it
Where our checks saw it
Each glowing city had slow or failing checks during the incident, shown at its worst. We test from 6 cities, so other places may have been hit too.
Our checks, city by city
Each point is one check every 30 minutes, from three hours before the incident to three hours after. Coloured points are the checks we counted as slower or failing. The shaded area shows how far above the usual time they were. Not affected: Amsterdam, San Francisco, Singapore, Tokyo, Mumbai.
Montreal
Every check as a table
| Time (UTC) | Check | Reading |
|---|---|---|
| 14:00 | 1.65 s | Normal |
| 14:30 | 1.69 s | Normal |
| 15:00 | 1.66 s | Normal |
| 15:30 | 1.28 s | Normal |
| 16:00 | 1.37 s | Normal |
| 16:30 | 7.13 s | Much slower, or failing |
| 17:00 | 4.24 s | Much slower, or failing |
| 17:30 | 1.25 s | Normal |
| 18:00 | 1.30 s | Normal |
| 18:30 | 1.16 s | Normal |
| 19:00 | 1.12 s | Normal |
| 19:30 | 1.24 s | Normal |
| 20:00 | 1.66 s | Normal |
| 20:30 | 1.30 s | Normal |
| 21:00 | 1.32 s | Normal |
| 21:30 | 1.22 s | Normal |
| 22:00 | 1.41 s | Normal |
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