Anthropic Investigating Elevated Errors Across Multiple Claude Models

Four Claude AI models experiencing service degradation as company works to identify root cause.

By The Downtime · Aug 24, 2026 · 5:15 AM ·Updated 2 weeks ago

Anthropic is investigating elevated error rates affecting Claude Mythos 5, Claude Fable 5, Claude Opus 5, and Claude Opus 4.8, according to the company's status page. The incident is classified as major impact and remains under investigation.

Anthropic develops Claude, an AI assistant used by developers, enterprises, and researchers for a range of tasks including software development, content analysis, and customer support applications.

The company posted notice of the issue on its status page indicating it is actively investigating the errors. No additional details about the scope or duration of the outage have been provided. Anthropic said it will provide an update as soon as possible.

This is a developing story. The Downtime will continue to monitor and update as more information becomes available.

🕒 Live updates (5)

resolved Aug 24, 8:30 AM

This issue has been resolved. From 9:50pm PT / 04:50 UTC through 00:36am PT / 07:36 UTC, users saw elevated errors on requests to Claude models, including Claude Opus 5 and Fable 5.

identified Aug 24, 7:47 AM

At this time, we have seen errors stabilize on Opus 5 and Fable 5, and are working to fully resolve success rates on all affected models. We will provide an update as soon as possible.

identified Aug 24, 6:42 AM

We are continuing to work to resolve issues causing elevated requests on multiple models. We will provide an update as soon as possible.

identified Aug 24, 5:27 AM

We have identified the cause of elevated errors on requests to Claude Mythos 5, Claude Fable 5, Claude Opus 5, and other Claude models and are working on a fix. We will provide an update as soon as possible.

investigating Aug 24, 5:06 AM

We are investigating elevated errors on requests to Claude Mythos 5, Claude Fable 5, Claude Opus 5, and Claude Opus 4.8. We will provide an update as soon as possible.

📎 Sources

Anthropic status ↗

Outage details are aggregated from official provider status pages. The Downtime reports them as a public service and is not affiliated with the providers named.