What visitors reported during this incident

No visitor reports were filed for this incident.

Having problems with Anthropic now? Check the current status

Affected services

Claude Coworkclaude.aiClaude CodeClaude API (api.anthropic.com)

Updates (4)

Sep 15, 2026, 11:14 AM
Intermittent error spikes for Claude Mythos 5.1 and Claude Fable 5.1
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.
Anthropic ↗
Sep 15, 2026, 10:50 AM
Intermittent error spikes for Claude Mythos 5.1 and Claude Fable 5.1
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.
Anthropic ↗
Sep 15, 2026, 09:52 AM
Intermittent error spikes for Claude Mythos 5.1 and Claude Fable 5.1
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.
Anthropic ↗
Sep 15, 2026, 09:48 AM
Intermittent error spikes for Claude Mythos 5.1 and Claude Fable 5.1
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.
Anthropic ↗

What to do next

Verify your own services recovered cleanly. Some upstream outages leave queues or caches in a degraded state, run smoke tests before declaring green internally.
Save the post-mortem. Vendors usually publish a detailed RCA 1-3 days later. We'll add it to this page when it appears.
Watch the provider going forward. Follow Anthropic's status feed →

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