Bad start to the day for Claude users. On Monday, August 24, 2026 in the morning, Anthropic’s AI ran into an outage that sparked a flood of errors across several models. The company quickly acknowledged the incident, saying it has identified the cause. A fix is being rolled out, but the service has not yet fully returned to normal.
A bumpy start to the week for some Claude users. On Monday morning, August 24, 2026, Anthropic’s artificial intelligence is experiencing disruptions that affect several of its models.
On its status page, Anthropic acknowledged at 5:06 UTC, i.e. 7:06 in Paris that it is investigating a spike in errors affecting notably Claude Mythos 5, Claude Fable 5, Claude Opus 5 and Claude Opus 4.8.
In practice, some users report errors when submitting a request, experience instances where Claude doesn’t respond, or see a message saying the service is temporarily overloaded. However, online accounts suggest the outage does not affect all users or all models in the same way.
Anthropic says it has identified the cause of the problem, but has not provided further technical details for the time being.
At 7:27 a.m., Paris time, the company said it had pinpointed the source of the elevated error rate across Claude Mythos 5, Claude Fable 5, Claude Opus 5 and other models, and was working on a fix.
We should therefore tread carefully regarding the exact cause of the incident: Anthropic has not specified whether it was an overload of its infrastructure, a software issue, or another internal malfunction.
For now, Anthropic has not provided any ETA for restoration.
A fresh update posted at 8h42, Paris time said teams were continuing to tackle the issues behind the spike in errors seen across several models. No timeline was provided at that point.
At 9:08 a.m. this Monday morning, it is therefore impossible to provide a reliable ETA for a full return to normal. The good news is that the root cause has been identified: Anthropic’s teams are no longer merely in an investigative phase, but are now working to resolve the incident.
Disruptions can affect both Claude.ai and tools that rely on the relevant models, notably Claude Code or Anthropic's API.
Users have reported, for example, errors such as “API Error: 529 Overloaded”, typically linked to server downtime or a temporary overload on the server side. Others say they can use certain models while others remain unavailable.
That means that having working access to Claude doesn’t necessarily guarantee that all models have been restored.
This outage comes after several disruptions logged in recent days. Claude's status page notably reports incidents on August 18, 19 and 20, with errors or degraded performance across several models and services.
On August 19, for instance, Claude Opus 5 and Claude Haiku 4.5 experienced degraded performance before a fix was rolled out. On August 20, Anthropic also reported elevated error rates across several models, which were resolved within a matter of minutes.
For this outage on August 24, 2026, we will be watching Anthropic’s forthcoming updates. For now, the cause has been identified and the teams are working to restore service, but no ETA for a return to normal operations has been announced.
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