Frontier models from Anthropic, Open AI, and x AI all experienced rare outages on Thursday morning, creating downtime for their corresponding AI chatbots. Space X, x AI’s parent company, said on Thursday afternoon that the issues with Grok resulted from “an outage at our Memphis compute center this morning.”

The issues initially appeared to be linked because they coincided—perhaps the result of a shared third-party service provider—but neither Open AI nor Anthropic cited an external source in comments to WIRED on Thursday. Space X, x AI’s parent company, did not respond to WIRED’s request for comment. But the company said as part of its public comments on Thursday: “We’d also like to apologize to our impacted compute partners.” Anthropic and x AI announced a “compute partnership” with Space X in May.

Open AI spokesperson Kathleen Chaykowski tells WIRED: “A routing error starting around 7:43 am PT on Thursday, September 3, made Chat GPT and Codex unavailable for some users across platforms. As of about 8:17 am PT on Thursday, a solution was successfully implemented and is continuing to be monitored.” Anthropic declined to comment on the episode. The company began alerting about a “partial outage” at 6:23 am PT that involved “elevated errors on requests to Claude Mythos 5.1, Claude Fable 5.1, and Claude Opus 5.” It was resolved by 9:16 am PT.

x AI reported Grok outages from 6:30 am PT, with service restored by 10:05 am PT. There were scattered reports of a possible Google Gemini outage, but Google did not confirm. Major internet infrastructure players—including Cloudflare, Amazon Web Services, and Microsoft Azure—did not report outages on Thursday.