Current answer
Anthropic (Claude) experienced a major incident: Elevated errors for multiple models. ServiceAlert observed recovery on Sep 3, 2026.
Official Anthropic (Claude) status page Current Anthropic (Claude) status
ServiceAlert observed status change:
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Incident Lifecycle
Affected Components
claude.ai
Claude API (api.anthropic.com)
Claude Code
Claude Cowork
Incident Timeline
Monitoring
A fix has been deployed for Claude Mythos 5.1, Claude Fable 5.1, and Claude Opus 5 and we are monitoring for recovery.
Sep 3, 2026 at 4:06 PM UTC
Identified
The only affected models right now are Opus 4.8 and Opus 5. The rest of the models have recovered to baseline error rate.
Sep 3, 2026 at 3:25 PM UTC
Identified
We are continuing to work on a fix for this issue.
Sep 3, 2026 at 2:49 PM UTC
Identified
An exhaustive list of affected models: Mythos/Fable 5.1, Mythos/Fable 5, Opus 5, Opus 4.8, Opus 4.6.
Sep 3, 2026 at 1:50 PM 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.
Sep 3, 2026 at 1:41 PM 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.
Sep 3, 2026 at 1:26 PM UTC
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