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Frontier reasoning models, trained at unprecedented scale.
xAI develops the Grok family of frontier AI models, trained end-to-end on the Colossus supercomputing cluster. Following the 2026 merger with SpaceX, xAI operates as part of a vertically integrated AI and infrastructure segment, with Grok embedded across the X platform, Tesla vehicles, and Optimus robots - one model family, deployed everywhere the group ships hardware or software.
A dedicated 230,000+ GPU cluster trains every generation of Grok, purpose-built rather than rented capacity from a third party.
Colossus was designed and built specifically for training Grok, not leased from a third-party cloud - giving xAI full control over scheduling and scaling.
Founded to develop frontier AI models with a focus on reasoning capability, trained on dedicated rather than rented infrastructure.
A purpose-built training supercomputer began operating in Memphis, compressing the time needed to train each new model generation.
xAI became part of a vertically integrated AI and infrastructure segment, with Grok embedded across X, Tesla vehicles, and Optimus.
Grok is xAI's family of large language models, trained end-to-end on the Colossus GPU cluster and deployed directly into X, Tesla vehicles, and Optimus. Rather than a single chatbot product, it's one model family embedded across every surface the group ships - the same reasoning engine answering a question on X, planning a route in a Tesla, or deciding a grip motion in Optimus's hand.
View GrokFrontier reasoning models, trained on Colossus
A dedicated 230,000+ GPU cluster trains every generation of Grok, purpose-built rather than rented capacity from a third party.
Large-scale GPU training cluster
Colossus was designed and built specifically for training Grok, not leased from a third-party cloud - giving xAI full control over scheduling and scaling.
Early looks at what xAI is building next - previews and prototypes, not yet available to buy.
