Degraded performance for multiple models
Aug 18, 16:20 UTCAug 18, 19:01 UTC
Duration
2h 41m
Impact
Minor
Root cause
Not disclosed
Anthropic, 90 days
94 incidents
Affected
claude.aiClaude API (api.anthropic.com)Claude CodeClaude Cowork
Final update
The issue affecting Claude Opus 5 has been resolved. Impact occurred from 16:11 to 18:23 UTC.
Timeline
- Resolved · Aug 18, 19:01 UTC
The issue affecting Claude Opus 5 has been resolved. Impact occurred from 16:11 to 18:23 UTC.
- Monitoring · Aug 18, 18:26 UTC
A fix has been implemented and we are monitoring the results.
- Investigating · Aug 18, 17:12 UTC
We are investigating elevated errors on requests to Claude Opus 5. We will provide an update as soon as possible.
- Investigating · Aug 18, 16:20 UTC
We are investigating elevated errors on requests to Claude Mythos 5, Claude Fable 5, Claude Opus 5, Claude Sonnet 5, Claude Haiku 4.5, and other Claude models. We will provide an update as soon as possible.
- Investigating · Aug 18, 16:20 UTC
We are investigating reports of degraded performance affecting multiple models. We will provide an update as soon as possible.
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.