Artificial Intelligence
Anthropic says Claude outage affects multiple models
Anthropic said its status page showed an ongoing outage on Claude, with elevated errors affecting several models from about 9:41 AM ET and a fix still in progress.
- Anthropic said Claude was experiencing an outage on 3 September 2026.
- The incident began at about 9:41 AM ET and caused elevated errors on requests to affected models.
- Anthropic first said it was investigating elevated errors on Claude Mythos 5.1, Claude Fable 5.1 and Claude Opus 5.
- It later said the outage affected Mythos/Fable 5.1, Mythos/Fable 5, Opus 5, Opus 4.8 and Opus 4.6.
- At 10:49 AM ET, Anthropic said it was still working on a fix, and the outage remained ongoing at the time of writing.
Anthropic said Claude was experiencing an outage, with users seeing elevated errors when they sent requests. The incident began at about 9:41 AM ET on 3 September 2026.
The company initially said it was investigating elevated errors on requests to Claude Mythos 5.1, Claude Fable 5.1 and Claude Opus 5. It later said it had identified the cause and was working on a fix.
Anthropic then published a fuller list of affected models. It said the outage affected Mythos/Fable 5.1, Mythos/Fable 5, Opus 5, Opus 4.8 and Opus 4.6.
The article said requests could fail to complete or return errors when users used one of the affected models. At 10:49 AM ET, Anthropic said it was still working on the issue.
Named in this story
Companies
- Anthropic
- said it had identified the cause and was working on a fix
Products and systems
- Claude
- the service reported as experiencing an outage
- Claude Mythos 5.1
- one of the models first named as affected
- Claude Fable 5.1
- one of the models first named as affected
- Claude Opus 5
- one of the models first named as affected
- Claude Mythos 5
- one of the later affected models
- Claude Opus 4.8
- one of the later affected models
- Claude Opus 4.6
- one of the later affected models
How the source tells it
The source was a plain status update with no distinct emotive framing.
No emotive framing was found in the original.