Tesla and SpaceX on Thursday formally committed to Terafab, a jointly developed semiconductor complex that will rise in Grimes County, Texas — just north of Houston — with an initial $16.8 billion investment. Elon Musk called it "the largest and most valuable building on Earth by far," and SpaceX said the facility will span more than 100 million square feet of manufacturing floor once built out.
What Terafab Will Build
SpaceX describes Terafab as a vertically integrated fab that will "bridge the divide between current global chip supply and the compute demand of the future." The site will house manufacturing, packaging and testing of both advanced logic and memory devices, with output aimed at edge-inference silicon for Tesla's Optimus humanoids and self-driving Cybercab, plus high-power chips for SpaceX's planned space-based data centers.
An Elon-Sized Bet On Vertical Integration
The pitch: rather than wait in line behind hyperscalers at TSMC, Musk's empire will co-locate design, fab, packaging and test in a single Texas campus so "fast, recursive improvements" can compound. SpaceX has previously indicated the multi-phase plan could ultimately draw as much as $119 billion in capex, and Intel has already signed on as a manufacturing partner (with its exact contribution still undisclosed).
Community And Utilities
The formal announcement followed a heated Grimes County meeting where residents pressed on tax incentives and transparency. SpaceX said it will draw process water from the Gibbons Creek Reservoir rather than tap local groundwater, and the companies expect Terafab to employ at least 3,000 people across Grimes and neighboring Brazos County when fully staffed. Texas Governor Greg Abbott's office confirmed the deal in a joint statement with the Anderson-Shiro Consolidated Independent School District.
Why It Matters For Robotics
Musk's robotics roadmap — millions of humanoids on factory floors, an autonomous Cybercab fleet, orbital compute — is fundamentally a silicon-supply problem. Terafab is the answer Musk is willing to underwrite himself, echoing similar in-house fab ambitions from the AI6 chip deal with Samsung earlier this month. It also cements Texas's role as America's emerging semiconductor corridor.
Reporting based on coverage from TechCrunch, the SpaceX company blog, the Austin American-Statesman and the Texas Governor's office.