Claude (Anthropic) outage, 15 September 2026
Intermittent error spikes for Claude Mythos 5.1 and Claude Fable 5.1
- Started
- Resolved
- 15 Sept 2026, 11:14 UTC (after 1 h 26 min)
- Impact
- Major
- Affected
- claude.ai, Claude API (api.anthropic.com), Claude Code, Claude Cowork
Last update from Claude (Anthropic)
A fix has been deployed for Claude Mythos 5.1 and Claude Fable 5.1 and we are monitoring to ensure it has resolved the issue.
Read the full incident on the official Claude (Anthropic) status page
Is Claude (Anthropic) down now?
This page is the record of one past incident. For the live status, see Is Claude (Anthropic) down right now? - it reads the official status page every 2 minutes.