LLMs
ChatGPT, Claude and Grok Went Down at the Same Time — and No One Said Why
On 3 September 2026 ChatGPT, Claude and Grok went down within the same window, and none of the companies gave a clear cause. The episode is a lesson in AI’s hidden concentration risk: rival tools share the same clouds and CDNs, so ‘use a different one’ is not the backup it looks like.