Elon Musk's two biggest companies are getting into the chipmaking business together.
Tesla and SpaceX will initially invest $16.8 billion to build "Terafab," an advanced chip factory in Grimes County, Texas, according to Reuters reporting by Anhata Rooprai, summarized by Techmeme. TechCrunch reports the formal announcement came on August 6, 2026, ending months of speculation, and places the site just north of Houston.
The scale is the headline. Reuters reports that combined chip demand from SpaceX and Tesla is forecast to top 1 terawatt — a unit of power, not of chips, and an unusual way to size a semiconductor order. Finimize frames the project as a fab for AI chips.
What makes this different from a typical corporate expansion is who is building it. Chip fabrication is normally left to specialists like foundries that manufacture designs on contract. Here, two customers are proposing to build the factory themselves, for their own consumption. Tesla needs silicon for self-driving systems and robotics; SpaceX operates a satellite network. Rather than queue behind other buyers for scarce capacity, Musk's companies are signaling they would rather own the production line.
The $16.8 billion figure is explicitly described as an initial investment, which means the eventual cost could climb. Advanced fabs typically take years to build and qualify before producing anything at volume, so nothing about this changes chip supply in the near term.
Why it matters: if Terafab gets built, it would mark a shift in how the AI boom is financed — with the companies that consume the most computing power deciding to manufacture it themselves rather than buy it, and putting tens of billions of dollars of that bet in Texas.