---
title: "SpaceXSI: what it means · The AI Compute Race · DRYBURGH"
source: https://dryburgh.com/vol1/glossary/spacexsi
description: "SpaceXSI: The name the former xAI has carried since October 2026, inside SpaceX. See SpaceXAI. Chapters 7, 9."
---

# SpaceXSI

What does “SpaceXSI” mean?

SpaceXSIThe name the former xAI has carried since October 2026, inside SpaceX. See SpaceXAI. *Chapters 7, 9.*

From *The AI Compute Race*. [Read the book](https://dryburgh.com/vol1#buy)

## Where the book uses it

- [Chapter 7 — The Double Blockade](https://dryburgh.com/vol1/notes/chapter-7)Two governments deciding one trade: Washington’s export rules and Beijing’s instructions at the border, and what each did to the chip business it meant to shape.
- [Chapter 9 — The Price of Permission](https://dryburgh.com/vol1/notes/chapter-9)Who gets to say yes or no to a campus: counties, air regulators, courts and legislatures, and what their permits, abatements and refusals cost in time and money.

## Where the record uses it

- Person [Musk, Elon](https://dryburgh.com/vol1/people#musk-elon)

## Sources that use it

- SpaceX (xAI), “What is The X Subscription” and “Cursor Token Rate,” docs.x.ai, pages marked last updated 12 and 11 October 2026, as served 15 October 2026 (“New customers, including anyone with only a free X account, start on The X Subscription”; “Grok and Cursor share a weekly included usage pool”; “Teams on The X Subscription pay a Cursor Token Rate of $0.25 per million tokens on third-party model requests. The rate applies on top of the model’s API pricing.”; “First-party models, including Grok and Composer, are exempt.”; the seller’s own documentation; the pages give no launch date; each page titled “SpaceXSI Docs”). [In the Sources](https://dryburgh.com/vol1/sources/company#xai-x-subscription-docs-oct26)
- Elon Musk (@elonmusk), two posts on X, 4 October 2026 (at 1:40 a.m. Pacific time, in three lines: “No more AI”, “SI”, “It’s better”; at 2:07 a.m., in reply to a user asking “Any possibility of renaming to SpaceXSI??”: “Yes, we will make that change”; the posts as served 20 October 2026, with the replies beneath them). [In the Sources](https://dryburgh.com/vol1/sources/other#musk-spacexsi-oct26)
- The Information, “Musk to Change SpaceXAI’s Name to SpaceXSI,” item 2 of The Information AM, 5 October 2026, and The Briefing of 4 October 2026 (“Elon Musk will change the name of SpaceX’s AI unit, SpaceXAI, to SpaceXSI, he said in a post on X on Sunday, adopting President Donald Trump’s preferred name for AI”; the newsletters as received by email). [In the Sources](https://dryburgh.com/vol1/sources/press#theinfo-am-spacexsi-oct26)

## Related terms

- [SpaceXAI](https://dryburgh.com/vol1/glossary/spacexai)
- [Colossus](https://dryburgh.com/vol1/glossary/colossus)
- [xAI](https://dryburgh.com/vol1/glossary/xai)
- [Affiliates rule](https://dryburgh.com/vol1/glossary/affiliates-rule)
- [Agreed order](https://dryburgh.com/vol1/glossary/agreed-order)
- [Catalytic controls](https://dryburgh.com/vol1/glossary/catalytic-controls)
- [Clean Air Act](https://dryburgh.com/vol1/glossary/clean-air-act)
- [Consent](https://dryburgh.com/vol1/glossary/consent)
- [Cut-out](https://dryburgh.com/vol1/glossary/cut-out)
- [Double blockade](https://dryburgh.com/vol1/glossary/double-blockade)
- [Entity List](https://dryburgh.com/vol1/glossary/entity-list)
- [EUV](https://dryburgh.com/vol1/glossary/euv)

From the glossary of The AI Compute Race.

- [Campuses](https://dryburgh.com/vol1/ledger)
- [Tests](https://dryburgh.com/vol1/tests)
- [Scorecard](https://dryburgh.com/vol1/scorecard)
- [Data](https://dryburgh.com/vol1/data/releases)
- [Chapter by chapter](https://dryburgh.com/vol1/companion)
- [The record at a glance](https://dryburgh.com/vol1/observatory)
- [The machine](https://dryburgh.com/vol1/machine)
- [One campus, four futures](https://dryburgh.com/vol1/hyperion)
- [Glossary](https://dryburgh.com/vol1/glossary)
- [People](https://dryburgh.com/vol1/people)
- [Sources](https://dryburgh.com/vol1/sources)
- [Notes](https://dryburgh.com/vol1/notes)
- [Where the book was wrong](https://dryburgh.com/vol1/corrections)
- [Where its sources were wrong](https://dryburgh.com/corrections?book=vol1)
- [The Paper](https://dryburgh.com/vol1/paper)
- [Consent](https://dryburgh.com/vol1/consent)
- [Who builds and pays](https://dryburgh.com/vol1/parties)

*The AI Compute Race: Five Races, One Machine* is a book by Lee S. Dryburgh, the first volume of THE COMPUTE ECONOMY, published by Dryburgh, an imprint of Contestra OÜ, Tallinn, Estonia; its record closes on 8 November 2026.

[About the book](https://dryburgh.com/vol1)[Tell me when it is out](https://dryburgh.com/vol1#notify)