ChatGPT, Claude, and Grok all went down simultaneously, with no explanation provided`.
2026-09-04 11:56Models🔥 44.2 heat score
1sources
1days unfolding
44.2heat score
4mentions
SummaryAI generated
On September 3, 2026, global mainstream artificial intelligence model services experienced disruptions simultaneously. Starting at 9:30 a.m. Eastern Time, Grok was the first to experience a failure; subsequently, ChatGPT displayed error messages around 11 a.m.; Claude experienced partial service interruptions during the same time window for approximately 3 hours and 6 minutes. OpenAI attributed the incident to “ Routing errors”, while The Register stated that their servers failed. Currently, there is no unified explanation from the three companies, and no consensus has been reached.
On September 3, ChatGPT, Claude, and Grok all experienced downtime simultaneously. Grok started experiencing problems at 9:30 AM ET, ChatGPT began displaying errors around 11 AM, and Claude experienced a partial interruption that lasted 3 hours and 6 minutes during the same time frame. The three companies gave different explanations: OpenAI said it was due to “route errors,” while The Register reported that it was a “server failure.”