Major AI Platforms Suffer Widespread Service Outages

Several leading AI platforms experienced widespread service outages on Thursday morning, September 3, 2026. Disruptions began around 09:00 ET for Anthropic and xAI, with OpenAI following at approximately 10:30 ET. Users of ChatGPT and Codex reported elevated errors, while Claude users encountered messages citing unexpected capacity constraints and Grok users were notified that the model was temporarily unavailable.

OpenAI and Anthropic both announced that they applied mitigations and observed services recovering to baseline. The outages coincided with technical issues at Cloudflare, an infrastructure provider. Cloudflare reported an HTTP/3 issue affecting R2 custom domains and incorrect geolocation for some WARP users, leading to concerns that these infrastructure glitches were linked to the AI platform failures.