Lab
SpaceXSI, formerly xAI.
In plain English
The lab behind Grok, founded by Elon Musk as xAI in 2023 and now part of his rocket company, SpaceX. It renamed itself SpaceXSI in October 2026, days after President Trump ordered US government departments to say "Super Intelligence" instead of "AI" (see AI). Grok is closely tied to X and its live social data, and SpaceXSI now bundles Grok with X Premium and the coding tool Cursor in one subscription. It also runs its own giant data centre, Colossus, in Memphis.
Models to know
Grok 4.7, the main model for coding and knowledge work. Grok 4.6 is still available through some cloud platforms. The wider family also covers images and video (Grok Imagine) and speech (Grok Voice). Grok Bot is the agent that runs on top of the models: a digital teammate you give files, apps and know-how to, which picks whichever model is most likely to get the job done.
Who's in charge
Elon Musk, founder.
Things to be aware of
In April 2026, during his court case against OpenAI, Musk admitted under oath that xAI had "partly" trained Grok by distilling OpenAI's models (see Distillation). OpenAI's terms don't allow it. Grok has also posted offensive and false material in public, and in early 2026 people used it on X to make sexualised images of real people, including children, which led to investigations by regulators including Ofcom and the European Commission.
Read more
Reuters on the rename to SpaceXSI · TechCrunch on the X, Grok and Cursor bundle · TechCrunch on Musk's distillation testimony · Gizmodo on Grok Bot