Overview
- Users and Downdetector reported a sharp rise in complaints about Claude starting Wednesday afternoon, with many requests failing with a “529 Overloaded” server error.
- Claude Code and the API were hit hardest, accounting for roughly half of outage reports and leaving many users unable to access the app or web console.
- Anthropic began an investigation Wednesday evening and posted status updates saying engineers identified the issue and were working on fixes.
- The company reported partial recovery across most Claude models within about an hour for many users but warned some requests may still see elevated errors or latency.
- The outage highlights how server-side overloads can ripple into developer tools and customer apps, and Anthropic says it will provide further updates rather than disclose a root cause immediately.