Musk launches Terafab, a $20–25B Tesla–SpaceX–xAI AI chip fab project in Austin aiming at 1 terawatt of compute a year
On March 21, 2026, at the disused Seaholm Power Plant in Austin, Elon Musk launched Terafab, a joint chipmaking project of Tesla, SpaceX and xAI to build a vertically integrated fab for AI and memory chips, estimated at $20–25B. It targets "one terawatt" of AI compute a year and up to 1 million wafer starts per month, with output only for Musk's companies, mostly for planned orbital AI data centers.
Key facts
- Announced March 21, 2026 at the Seaholm Power Plant, Austin; initial site on the North Campus of Giga Texas
- Estimated cost $20–25B; partners Tesla, SpaceX and xAI (xAI by then part of SpaceX)
- Targets: 1 TW of AI compute a year; 100,000 to 1 million wafer starts per month at full scale; 100–200 billion custom AI and memory chips a year; 2 nm-class process (Electrek)
- Musk said about 80% of output would go to orbital AI satellites, arguing space compute could become cheaper than terrestrial within 2–3 years (Electrek)
- Skeptics noted that neither Tesla nor SpaceX had any semiconductor-manufacturing experience (Electrek compared it to the 4680 battery promises)
What happened
Musk presented Terafab as a single complex for chip design, lithography, fabrication, memory, advanced packaging and testing, built because existing foundries could not grow fast enough for Tesla's robots and cars and SpaceX's planned space data centers.
Why it matters
It is the most ambitious attempt by an AI company to make its own chips rather than rely on TSMC, and it frames compute in power terms (terawatts). Its later partners (Intel, then talks with TSMC) and the Grimes County site trace how the plan evolved.
Changelog
- 2026-10-05: created (backfill from the leads queue)
People
Related events
- Intel joins Musk's Terafab as manufacturing partner; Musk later says Terafab will use Intel's 14A process, Intel's first big external 14A customer ★★★
- Texas announces SpaceX's $16.8B first phase of Terafab in Grimes County, a 100-million-sq-ft chip campus with 3,000 jobs ★★★
- Musk confirms TSMC talks over Terafab, the Tesla–SpaceX AI chip fab in Texas ★★★
Sources (4)
- pressElectrek: Tesla and SpaceX announce $25B 'Terafab' chip factory (Mar 22, 2026)
- pressTeslarati: Elon Musk launches Terafab
- pressAutomotive World: Musk unveils Terafab as Tesla-SpaceX joint chip venture
- discussionWikipedia: Terafab
id: 2026-03-21-terafab-announced · updated 2026-10-05 · open in the interactive timeline