# Anthropic: Elevated errors for multiple models

- Provider: [Anthropic](https://outages.cc/anthropic.md)
- Type: Incident
- State: Resolved
- Worst impact: Partial outage
- Started: 2026-09-22 00:57 UTC
- Resolved: 2026-09-22 02:35 UTC (lasted 1 h 38 min)
- Components: claude.ai, Claude API (api.anthropic.com), Claude Code, Claude Cowork
- Official update: https://stspg.io/90s4l9yywzbk

## Updates from Anthropic

### resolved, 2026-09-22 02:35 UTC

This issue has been resolved. Impact occurred from 5:50pm PT / 00:50 UTC to 7:10pm PT / 02:10 UTC.

### monitoring, 2026-09-22 02:11 UTC

We have seen success rates return to normal across affected models, and are monitoring closely to ensure no further issues.

### identified, 2026-09-22 01:35 UTC

We are continuing to work to resolve errors affecting some models. At this time, requests to Claude Fable 5 and 5.1 and Mythos 5 and 5.1 have returned to normal success rates. We are working to resolve remaining errors affecting Claude Opus 5, and will provide an additional update shortly.

### identified, 2026-09-22 01:17 UTC

We have identified the cause of elevated errors on requests to Claude Mythos 5.1, Claude Fable 5.1, and Claude Opus 5 and are working on a fix. We will provide an update as soon as possible.

### investigating, 2026-09-22 00:57 UTC

We are investigating elevated errors on requests to Claude Mythos 5.1, Claude Fable 5.1, and Claude Opus 5. We will provide an update as soon as possible.