xAI

Startup

AI company focused on reasoning models.

Key people

Elon Musk

Founder; CEO of SpaceX (parent of SpaceXAI)

Founded xAI in 2023; after SpaceX acquired it in February 2026, xAI and Grok became SpaceXAI, an AI division of SpaceX, which Musk runs as CEO. He also leads Tesla.

@elonmusk

Michael Nicolls

President of xAI / SpaceXAI

Longtime Starlink engineering executive at SpaceX, named president of xAI in April 2026 after the departure of all its co-founders. He reorganised engineering into five lines with the stated goal of matching Anthropic's Claude.

@michaelnicollsx

Events (18)

21 Sep 2026

xAI

Key people

Elon Musk

Michael Nicolls

Events (18)

SpaceXAI releases Grok 4.7

SpaceXAI releases Grok 4.6

SpaceXAI releases Grok 4.5

SpaceX to acquire AI coding startup Cursor for $60B

SpaceX, now owner of xAI, completes the largest IPO in history

Anthropic rents all of xAI's Colossus 1 data center

SpaceX merges with xAI in a $1.25 trillion all-stock deal

Grok restricts image generation after sexualized deepfake backlash

xAI raises $20B Series E

xAI releases Grok 4.1

Pentagon awards up to $200M each to Anthropic, Google and xAI

xAI launches Grok 4 and multi-agent Grok 4 Heavy

xAI launches Grok 3

xAI raises $6B in new funding round

xAI open-sources Grok model

xAI releases Grok-2 and Grok-2 Mini

xAI raises $6B Series B

xAI announces Grok-1.5