Four Major AI Models Suffer Rare Overlapping Downtime

ChatGPT, Claude, Grok, and Gemini all suffered significant service disruptions within roughly the same few-hour window Thursday morning.

OpenAI and Anthropic reported elevated errors and later restored service, while Grok remained impaired and third-party monitoring indicated a likely Gemini outage despite no public acknowledgment from Google.

Ars Technica reports: Other major Internet services, including Amazon Web Services, Microsoft Azure, and Cloudflare, have not reported any major issues as of press time Thursday, though issue reports on DownDetector did spike somewhat for all three this morning. While the affected frontier models go down occasionally, having all four experience interruptions in the same short period is practically unheard of.

Claude reports 99.4 percent uptime for its services over the last 90 days and last reported a similar three-hour "partial outage" on August 24. OpenAI reports 99.63 percent uptime for ChatGPT and 100 percent uptime for ChatGPT Codex in the same period. ChatGPT's so-called "Work Mode" reported an hours-long period of "elevated latency" on August 31.