Outage in Claude
Elevated errors for Claude Mythos 5.1 and Claude Fable 5.1
Resolved MajorIncident Report
Summary AI Generated
Claude Mythos 5.1 and Claude Fable 5.1 experienced elevated errors for approximately 16 minutes on October 5, 2026, between 05:40–06:10 PT, affecting both claude.ai and api.anthropic.com. The issue was investigated and fully resolved by 06:10 PT.
We are investigating elevated errors on requests to Claude Mythos 5.1 and Claude Fable 5.1. We will provide an update as soon as possible.
Components affected
Claude claude.ai Claude api.anthropic.comLatest Updates ( sorted recent to last )
RESOLVED
about 15 hours ago - at 10/05/2026 01:21PM
The issue affecting Claude Mythos 5.1 and Claude Fable 5.1 has been resolved. Impact occurred from 05:40 PT / 12:40 UTC to 06:10 PT / 13:10 UTC.
INVESTIGATING
about 15 hours ago - at 10/05/2026 01:05PM
We are investigating elevated errors on requests to Claude Mythos 5.1 and Claude Fable 5.1. We will provide an update as soon as possible.
Latest Claude outages
Elevated errors for multiple models - 14 days ago
Elevated errors for multiple models - about 1 month ago
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