xAI

xAI is an artificial intelligence company founded in 2023 by Elon Musk and Christian Szegedy. It develops Grok, a conversational model distributed through X and designed around access to current information, along with the infrastructure needed to train and serve it. The company’s public identity combines frontier model development with a deliberately irreverent product voice.

Grok-1 launched on X in 2023, followed by open weights, vision and image-generation work, Grok-3 in 2025, and Grok 4 and Grok 4 Heavy later that year. The model line has moved from a chatbot embedded in a social platform toward a family of systems intended for reasoning, coding, and multi-agent tasks.

The other half of xAI’s strategy is Colossus, its large training cluster in Memphis. The company expanded the site from its initial GPU deployment to a much larger multi-building operation, making compute capacity part of the product story rather than an invisible supplier.

SpaceX acquired xAI in 2026, placing the model company inside a broader aerospace and infrastructure group. That structure gives xAI access to capital, hardware, and distribution, while concentrating its product, data, and governance decisions in one corporate ecosystem.