SpaceXAI apologized after Grok went down for about 3.5 hours from 6:30 a.m. PT on September 3, 2026 across X, iOS and Android. The company said the Memphis models cluster outage also affected unnamed compute partners and that it is taking corrective action. Elon Musk said the team would address the failure; the company did not name other chatbots as sharing the same root cause.
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