Anthropic's Claude AI service appeared to stop working on Tuesday. Here's what we know so far.
Anthropic's Claude AI appeared to experience an outage on Tuesday, according to online reports.
Users reported a spike in errors to Downdetector, with more than 2,000 reports as of 1:27 p.m. ET/10:27 a.m. PT. The number of reports dropped significantly pretty quickly as Anthropic implemented a fix. (Disclosure: Downdetector and CNET are owned by the same parent company, Ziff Davis.)
Anthropic's status page reported the issue just before 1:30 p.m. ET, with the company saying it is investigating elevated errors affecting many models and across the Claude web interface, API, Claude Code and Claude Cowork. Later updates said the company had attempted to fix the issue and was monitoring results, but the company is still seeing issues with a couple of models.
CNET has reached out to Anthropic for details.
This is a developing story and will be updated.
Claude Opus 4.8 continues to see errors #
Anthropic provided another update to the current outage, stating that it's still seeing errors for Claude Opus 4.8 and that it's continuing to work on a fix for the issue.
Anthropic still seeing errors on certain models #
In a third update, Anthropic said it's continuing to see errors with the Opus 4.8 and Haiku 4.5 models. A time for resolution or additional updates was not provided.
No, Fable 5 isn't back #
Commenters on Downdetector were joking and speculating that the outage meant Claude Fable 5 was making a return, but that's not what happened.
Fable 5, which is the mass market version of Anthropic's powerful Mythos 5 model, was released last week. Anthropic pulled access to the model Friday after the US government imposed export controls, barring any foreign nationals from using it. The Trump administration said there was a jailbreak that would allow users to skirt the guardrails in Fable, but Anthropic says the issue isn't as serious as the government has claimed and objected to the order.
Anthropic says it's fixed #
This may be a quick outage: Anthropic said in an update at 2 p.m. ET that it's implemented a fix for the issue and is monitoring the results.
The reports on Downdetector seemed to have peaked at 2,103 at 1:26 p.m. Those pretty quickly dropped to 518 at 1:41 p.m.