The SpaceXAI rebrand to SpaceXSI appears to be happening today. Elon officially announced they would be making the change a few days ago.
SpaceXAI rebrands to SpaceXSI, with Elon Musk's announcement days earlier
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Andrew Curran says SpaceXAI is rebranding to SpaceXSI today, after Elon Musk announced the change a few days ago. A related post from @hillofdirt says SpaceXAI is now officially SpaceX Super Intelligence.
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SpaceXAI is officially now SpaceX Super Intelligence @SpaceXSI
Source: Andrew Curran · x.comPublished · added here