Claude was down for some users on September 3, 2026, with elevated errors affecting requests to multiple Anthropic models, according to BleepingComputer. The report cites Anthropic’s status page as confirming the incident. BleepingComputer says the incident began on September 3, 2026, at around 9:41 AM ET. According to the report, Anthropic’s status page initially said the company was investigating elevated errors on requests to Claude Mythos 5.1, Claude Fable 5.1, and Claude Opus 5. A few minutes later, according to the report, Anthropic expanded the list of affected models. The outage was said to affect Mythos/Fable 5.1, Mythos/Fable 5, Opus 5, Opus 4.8, and Opus 4.6. The user-facing impact is straightforward: requests to affected Claude models may fail to complete or return errors. That matters for developers and businesses using Claude through applications or workflows where model availability is part of the service path. BleepingComputer reports that Anthropic said at around 9:41 AM ET it had identified the cause of the elevated errors and was working on a fix. At 10:49 AM ET, Anthropic said it was still working on the issue, and the outage remained ongoing at the time of BleepingComputer’s report. Who benefits: There is no clear beneficiary from the provided reporting. Users with fallback routing to unaffected models or providers may be better positioned during this kind of incident. Who's exposed: Developers and companies using the affected Claude models are exposed to failed or erroring requests. The source does not quantify how many users or customers were affected.