Nobody Is Saying Why OpenAI and Anthropic Had Outages Today

Anthropic, OpenAI, and xAI’s Grok all suffered brief outages Thursday morning, with Anthropic reporting elevated errors on Claude Mythos 5.1, Claude Fable 5.1, and Claude Opus 5.1 from 6:23 am PT and resolving by 9:16 am PT, while OpenAI cited a routing error from 7:43 am to 8:17 am PT that halted ChatGPT and Codex. xAI’s Grok experienced downtime from 6:30 am to 10:05 am PT, attributing the issue to an outage at SpaceX’s Memphis compute center, though OpenAI and Anthropic did not confirm a shared third-party cause.