Elevated errors on Sonnet 4, Sonnet 4.5 and Haiku 4.5
Nov 20, 08:10 UTCNov 20, 12:03 UTC
Duration
3h 53m
Impact
Major
Root cause
Not disclosed
Anthropic, 90 days
94 incidents
Affected
Not listed by the vendor.
Final update
As of 3:55 PT / 11:55 UTC the level of errors on Sonnet 4.0 has returned to normal.
Timeline
- Resolved · Nov 20, 12:03 UTC
As of 3:55 PT / 11:55 UTC the level of errors on Sonnet 4.0 has returned to normal.
More from Anthropic
Full history| Started | Incident | Impact | Duration |
|---|---|---|---|
| Sep 2200:57 UTC | Elevated errors for multiple models | major | 1h 38m |
| Sep 1616:18 UTC | Issues with Google Play subscriptions | none | 33m |
| Sep 1509:48 UTC | Intermittent error spikes for Claude Mythos 5.1 and Claude Fable 5.1 | major | 1h 26m |
| Sep 1114:19 UTC | Elevated errors for Claude Mythos 5.1 and Claude Fable 5.1 | major | 17m |
| Sep 1021:43 UTC | Elevated latency on the Claude API for some users | minor | 1h 41m |
| Sep 1015:54 UTC | Degraded functionality for Claude Cowork on Windows | major | 4d 3h |
Sources: vendors' own status pages, published postmortems and SEC 8-K Item 1.05 filings, read daily. Times as reported. Logos via logo.dev; trademarks belong to their owners.