Claude Status – Elevated errors for multiple models
Anthropic reports elevated errors on Claude Opus 5 after Fable and Mythos 5 and 5.1 recovered.
Anthropic's status page reports elevated request errors affecting several Claude models across claude.ai, the Claude API, Claude Code, and Claude Cowork. Requests to Claude Fable 5 and 5.1 and Mythos 5 and 5.1 have returned to normal success rates. Errors affecting Claude Opus 5 remain under remediation after Anthropic identified the cause.
- Incident spans claude.ai, the Claude API, Claude Code, and Claude Cowork.
- Fable 5 and 5.1 and Mythos 5 and 5.1 have recovered.
- Elevated errors remain on Claude Opus 5.
- Anthropic identified the cause and is working on a fix.
Full article149 words · extracted from status.claude.com · click to collapse
Update
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.
Posted Sep 22, 2026 - 01:35 UTC
Identified
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.
Posted Sep 22, 2026 - 01:17 UTC
Investigating
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.
Posted Sep 22, 2026 - 00:57 UTC
This incident affects: claude.ai, Claude API (api.anthropic.com), Claude Code, and Claude Cowork.
Text extracted automatically; images, tables and formatting may be missing. Original: https://status.claude.com/incidents/7g1qpkyz5gxh