Claude is down for some users, with Anthropic confirming elevated errors across multiple AI models. The disruption is causing requests to fail with a “529 Overloaded” message, including in Claude and tools that rely on its API.
Anthropic began investigating the outage at 7:49 p.m. UTC on July 29. At 8:33 p.m. UTC, the company said it had identified the issue and was working to resolve it, but did not reveal the underlying cause or provide a recovery timeline.
During the outage, I repeatedly encountered the following message: “API Error: 529 Overloaded. This is a server-side issue, usually temporary — try again in a moment.”
A 529 error generally means Claude’s servers are unable to handle the current volume of requests.
Thankfully, Anthropic is aware of the root cause and is working on a fix.
Update 1: As of 17:30 EDT, Anthropic says it’s continuing to work to fully resolve issues resulting in elevated requests and latency to Claude models.
It has already begun seeing recovery across most models, but some of you could still run into errors.
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