❯ Claude, ChatGPT and Grok recover from simultaneous outages with no confirmed common cause

recoveredClaude, ChatGPT and Grok are operational again after widespread outages on September 3. Per Wired, Claude and Grok failed within 4 minutes of each other and ChatGPT and Codex followed 73 minutes later — 4 products across 3 companies unavailable inside one hour, with no confirmed common cause so far.

the timelineThat 4-minute gap is the crux: 3 companies on different clouds and different stacks broke at nearly the same moment. OpenAI issued its own incident note but pointed to no shared upstream. Explanations from public infrastructure to similar traffic patterns all remain speculation, per Wired. These 3 services had never been down together within the same hour before; September 3 rewrote that too.

concentration riskWhat the incident exposed is upstream concentration. Most AI applications wire up two of these three for redundancy, and on Thursday that redundancy failed completely. Watch whether the postmortems from each company point at the same supplier — if they do, the industry’s whole disaster-recovery assumption needs rewriting.

▪ SIGNALThree frontier services down inside an hour is the first proof that multi-model redundancy may be no redundancy at all.