Tesla and SpaceX said Thursday they will sink an initial $16.8 billion into “Terafab,” a joint advanced semiconductor factory in Grimes County, Texas, marking the first concrete capital commitment toward a project SpaceX filings have pegged at up to $119 billion across multiple phases. The announcement puts a floor under the compute infrastructure Musk argues is necessary for millions of Optimus robots, a Cybercab fleet, and Starlink satellites repurposed as orbital data centers, demand that existing foundry capacity does not come close to satisfying.
The scale and the filing
SpaceX describes more than 100 million square feet of manufacturing space under one roof, a footprint that would make it the largest building on Earth by a wide margin. The company’s own regulatory filings show the $119 billion figure as a multi-phase ceiling, not a committed budget, and SpaceX did not mention Terafab on its first earnings call earlier this week. Intel has signed on to contribute but has not disclosed the size or nature of its stake, leaving the capital structure notably incomplete.
Intel's role and the water question
The factory will handle logic and memory fabrication, packaging, and testing in a vertically integrated flow designed for recursive iteration cycles. SpaceX said it will draw process water from the Gibbons Creek Reservoir rather than local groundwater, a concession to regional supply constraints that also sidesteps a common permitting flashpoint for large fabs in Texas. The reservoir commitment is framed as a sustainability measure; it also locks in a single large industrial user for a water body that has seen declining commercial demand since the nearby coal plant retired.
The county meeting and tax breaks
Hundreds of residents packed a Wednesday meeting to challenge the tax abatement package and the opacity of the negotiation. The Anderson-Shiro school district superintendent called the agreement a defining moment for the district and pledged transparent management of the resulting revenue. The gap between the $16.8 billion first tranche and the $119 billion filing ceiling, combined with Intel’s undisclosed role, means the public fiscal exposure remains an open variable, one the county will be measuring in property-tax increments for decades.