Outage in Anthropic
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 30 minutes on October 5, 2026, affecting both claude.ai and api.anthropic.com. The issue was resolved within 17 minutes of being identified, with full service restored 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.
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Latest Updates ( sorted recent to last )
RESOLVED
about 14 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 14 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 Anthropic outages
Delayed credits on the Claude Platform - 4 days ago
Elevated errors for multiple models - 14 days ago
Issues with Google Play subscriptions - 19 days ago
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