Ask HN: Why are OpenAI, Claude, and Grok simultaneously down? Coincidence?
ThinkingNews Desk · how this was written
On Thursday morning, OpenAI, Anthropic, and xAI’s Grok all experienced brief outages. Anthropic reported elevated errors on Claude Mythos 5.1, Claude Fable 5.1, and Claude Opus 5.1 from 6:23 am PT to 9:16 am PT, while OpenAI cited a routing error that halted ChatGPT and Codex from 7:43 am PT to 8:17 am PT. Grok was down from 6:30 am PT to 10:05 am PT, an outage traced to a failure at SpaceXAI’s Memphis compute center.
Written from all 4 reports below, not from any single one.
How it was reported
- Hacker News·Ask HN: Why are OpenAI, Claude, and Grok simultaneously down? Coincidence?
Users noted that the OpenAI, Anthropic Claude, and xAI Grok services are all experiencing outages at the same time and shared the respective status page URLs (https://status.openai.com, https://status.claude.com, https://status.x.ai) to confirm the incidents. The post asks whether the simultaneous downtime is coincidental or indicative of a broader issue.
- Ars Technica·Four major AI models suffer rare overlapping downtime
On Thursday morning, OpenAI, Anthropic, xAI, and Google experienced simultaneous service disruptions affecting their cloud-based AI models. Anthropic reported elevated errors on Claude Mythos 5.1, Claude Fable 5.1, Claude Opus 5, and briefly on Claude Sonnet 5, resolving the issue by 12:16 pm after deploying a fix. OpenAI saw degraded performance on ChatGPT and Codex from 10:43 am, implementing a mitigation that cleared the errors by 12:55 pm.
- Engadget·SpaceXAI apologizes for outage that affected Grok and other 'compute partners'
SpaceXAI’s Memphis compute center suffered an outage that disabled Grok on X, Android and iOS for three and a half hours starting at 6:30 a.m. PT, prompting the company to apologize to Grok users and unnamed “compute partners.” The same timeframe saw Anthropic’s Claude models and OpenAI’s ChatGPT and Codex experience elevated errors, though neither firm confirmed a link to SpaceXAI’s incident.
- Wired·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.
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