SpaceXAI (xAI)

Musk’s role: Founder

Founded as xAI in March 2023. Builds the Grok models and the Colossus data centres; part of SpaceX since February 2026.

Musk founded xAI with eleven researchers in March 2023, at the start of the AI boom; Grok 1 was released that November. In March 2025 xAI and X Corp. were combined, and in February 2026 SpaceX acquired xAI at a valuation of US$250 billion. It was renamed SpaceXAI in July 2026. Its Colossus data centres in Memphis and Southaven provide on the order of one gigawatt of AI compute, and other AI companies rent capacity there.

Milestones

▲Grok launched November 2023
▲Colossus data centres in Memphis
▲Combined with X in March 2025
▲Acquired by SpaceX in February 2026

Official website Wikipedia

More from the Musk universe

SpaceX

2002–present

Tesla

2004–present

Starlink

2019–present

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SpaceXAI (xAI) (2023–present) — Elon Musk’s role | Follow Musk to Pluto