# Anthropic: Elevated errors for Claude Mythos 5, Claude Fable 5, and Claude Sonnet 5

- Provider: [Anthropic](https://outages.cc/anthropic.md)
- Type: Incident
- State: Resolved
- Worst impact: Partial outage
- Started: 2026-08-13 14:33 UTC
- Resolved: 2026-08-13 16:08 UTC (lasted 1 h 35 min)
- Components: claude.ai, Claude API (api.anthropic.com), Claude Code, Claude Cowork
- Official update: https://stspg.io/pbnrks0mrn4w

## Updates from Anthropic

### resolved, 2026-08-13 16:08 UTC

The issue affecting Claude Mythos 5 and Claude Fable 5 has been resolved.

### investigating, 2026-08-13 15:44 UTC

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

### investigating, 2026-08-13 14:33 UTC

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