Anthropic Claude AI suffers worldwide outage

A widespread outage disrupted Anthropic's Claude artificial intelligence services on Wednesday, July 29, 2026, causing failed requests and error messages for users globally. The incident, which lasted for several hours, affected the Claude.ai chatbot, its application programming interface (API), and specialized tools like Claude Code, preventing users from submitting prompts or completing tasks.

The company first acknowledged elevated error rates across all Claude models at 7:49 p.m. UTC on July 29. Users began encountering "529 Overloaded" error messages, a server-side status code indicating the infrastructure was unable to handle the volume of incoming requests. Some users reported seeing messages stating Claude was unable to respond due to "unexpected capacity constraints." Outage tracking platforms registered a spike in user complaints, with reports surfacing from the United States, Australia, the United Kingdom, and parts of Europe.

Anthropic identified an issue affecting multiple models and worked on a resolution throughout the evening. The disruption also impacted third-party applications and services that rely on Anthropic's API, leading to increased latency and...