Top of the rack to the bottom · Today → 2022
How a social network and an AI startup ended up inside a rocket company. Read it like the server rack on the left: the top shelf is today, and scrolling down goes back to 2022, when Musk bought Twitter.
Tap a category to show only Grok, supercomputers, X, or the deals. Want everything Musk has built in one place? See the main timeline.
Grok & AI
October 25, 2026
Musk posts that Grok can now call a person or a business for you.
Key featureIt makes your request, takes notes on the answer, and sends you a summary. Which plans include it hasn’t been announced yet.
Read more →Supercomputers
In August, SpaceX and NVIDIA announce the chips for AI1, the first satellite in a planned million-satellite AI computing network in space.
Read more →Deals
In July, xAI is renamed SpaceXAI with a new logo nested inside the SpaceX brand. Grok keeps its name.
Read more →Supercomputers
Tesla, SpaceX, and xAI announce a joint chip factory in Texas planned to be the largest building in the world, to make the chips all three need.
Read more →Deals
In February, SpaceX acquires xAI outright. SpaceX now owns xAI, which owns X, with Grok at the center of both.
Read more →Grok & AI
In October, xAI launches an online encyclopedia written with Grok, as an alternative to Wikipedia.
Grok & AI
July 2025
A new generation of Grok that xAI says beats rival models on several hard reasoning tests.
Read more →Deals
In March, an all-stock deal puts the social platform and the AI company under one roof.
Read more →Grok & AI
February 2025
The first Grok trained on Colossus, with a “Think” mode that works through hard problems step by step before answering.
Read more →Supercomputers
Online: September 2024
xAI turns on a supercomputer in an old factory building in Memphis, Tennessee, to train future versions of Grok.
Key feature100,000 NVIDIA graphics chips working together, built in about four months, a job that usually takes years. It has since grown well beyond that.
Read more →Grok & AI
In March, xAI releases the underlying model of the first Grok for anyone to download and study.
Grok & AI
Launched: November 2023
xAI’s assistant launches for paying X users.
Key featureNear-live access to what people are posting on X, so it can talk about news as it happens, with a sense of humor that sets it apart from other chatbots.
Read more →X (Twitter)
In July, the blue bird is retired and Twitter is renamed X, part of Musk’s plan for an “everything app.”
Read more →Deals
March 2023
Musk starts an AI company with the stated mission “to understand the true nature of the universe.”
Read more →X (Twitter)
October 2022
Musk completes his $44 billion purchase of Twitter and becomes its owner.
Read more →That’s the bottom of the rack: the Twitter purchase in 2022. For what’s announced but not built yet, see What’s Next. For the whole story across every company, see the main timeline, or read more on the xAI page.
From four legs to two planets
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From four legs to two planets. Hover over or tap any figure. The one on the right can call home.