ChatGPT, Claude, Grok and Gemini suffer simultaneous outages

ChatGPT, Claude, Grok, and Gemini all experienced service interruptions at nearly the same time. The cause of the overlapping downtime has not been officially explained by any of the companies.

Why it matters: Four competing AI services going down at once points to a shared upstream dependency — likely cloud infrastructure, DNS, or a common network provider — rather than coincidence, notable given how much of the industry assumes redundancy across providers. None of the companies has named a cause, and as AI assistants get embedded into more workflows, an unexplained multi-vendor outage raises real questions about single points of failure in the shared infrastructure the whole industry depends on.