TL;DR
SpaceX and Tesla have chosen Grimes, Texas, as the site for a joint AI chip manufacturing facility — the Terafab — which will be the largest building in the world by floor area. The move consolidates Musk's industrial empire in Texas, positioning the state as the epicentre of AI-driven robotics, autonomous transport, and space-based computing.
What Happened
SpaceX and Tesla announced on Friday that their joint venture, the Terafab, will be built in Grimes, Texas — a rural community roughly 60 miles northwest of Houston. The facility, slated to become the world's largest building, will mass-produce AI chips designed to power three core product lines: Optimus humanoid robots, Cybercab autonomous vehicles, and space-based data centres operated by SpaceX's Starlink constellation.
Key Facts
- Grimes County, Texas was selected over competing sites in Nevada and Oklahoma, with construction expected to begin in Q1 2027 and first chip output targeted for late 2028.
- The Terafab will have a projected floor area of over 150 million square feet — roughly 26 times the size of the Pentagon and more than double the current record-holder, Boeing's Everett Factory in Washington state.
- The facility will produce AI chips using a custom architecture developed jointly by Tesla's in-house silicon team and SpaceX's avionics engineers, with initial capacity of 500,000 chips per month by 2030.
- The project carries an estimated price tag of $85 billion, funded through a combination of Tesla corporate bonds, SpaceX private equity, and Texas Enterprise Fund incentives worth approximately $4.7 billion.
- The plant is expected to employ 45,000 workers directly, with an additional 120,000 indirect jobs projected across the supply chain in the Houston–College Station corridor.
- Texas Governor Greg Abbott announced the deal at a press conference in Austin, calling it "the largest private industrial investment in American history."
- The Terafab will be powered by a dedicated 5-gigawatt solar and battery farm built on adjacent land, making it one of the largest renewable energy installations in the country.
Breaking It Down
The decision to locate the Terafab in Grimes County, rather than in an established tech hub like Austin or a logistics centre like Dallas, signals a strategic bet on land availability and regulatory speed. Grimes County offers something that coastal and metropolitan locations cannot: vast, inexpensive tracts of land with minimal zoning friction. The county's population is roughly 30,000, and local officials have already signalled they will fast-track all permitting for the project.
150 million square feet — the Terafab's planned floor area — is not just a scale-up of existing manufacturing; it represents a fundamental rethinking of what a factory can be.
At that size, the Terafab will function less as a single plant and more as a self-contained industrial city. It will include on-site chip fabrication cleanrooms, robotic assembly lines for Optimus, vehicle final assembly for Cybercab, and a dedicated launch-support facility for Starlink's space-based data centre hardware. The integration of these three production lines under one roof is unprecedented — no company has ever attempted to combine terrestrial robotics, autonomous vehicles, and orbital infrastructure manufacturing in a single contiguous facility.
The vertical integration strategy is the through-line. By co-locating AI chip production with the robots and vehicles that use those chips, SpaceX and Tesla eliminate the supply chain bottlenecks that have plagued the semiconductor industry since 2021. The Terafab's in-house architecture — reportedly a 7-nanometre class design optimised for inference workloads rather than training — is tailored specifically for the real-time decision-making required by Optimus and Cybercab. This is a deliberate departure from the GPU-centric approach favoured by Nvidia and AMD, which optimise for large-scale training clusters.
The space-based data centre component adds an entirely new dimension. SpaceX has long discussed the possibility of placing computational infrastructure in orbit to serve edge-computing needs for remote regions, but the Terafab gives that ambition a physical manufacturing base. Each Starlink satellite equipped with Terafab-produced chips would be able to perform on-orbit inference for customers in agriculture, maritime shipping, and defence — potentially displacing billions of dollars in terrestrial cloud infrastructure spending.
What Comes Next
The announcement is only the first phase of a project that will take more than a decade to reach full capacity. Several concrete milestones are already on the calendar.
- Groundbreaking ceremony — March 2027: Expected to feature Governor Abbott, Tesla CEO Elon Musk, and SpaceX President Gwynne Shotwell. The first phase of construction will focus on the chip fabrication cleanrooms, which require the most specialised building infrastructure.
- First chip tape-out — Q4 2028: The initial production line is scheduled to produce its first working AI chip by late 2028, with validation testing against Optimus and Cybercab prototypes beginning immediately thereafter.
- Optimus line ramp — Q2 2029: Full-scale assembly of Optimus humanoid robots is slated to begin in 2029, targeting an initial output of 10,000 units per month by the end of that year.
- Starlink orbital data centre deployment — 2030: The first satellites equipped with Terafab-produced chips are scheduled for launch aboard Falcon Heavy rockets, with a planned constellation of 1,200 orbital data centre satellites by 2033.
The Bigger Picture
This project sits at the intersection of three defining trends in contemporary business: reshoring of critical manufacturing, AI hardware specialisation, and the industrialisation of space. The Terafab is the clearest signal yet that the largest technology companies are no longer content to design chips and outsource fabrication to Taiwan or South Korea. By bringing production to Texas, Musk is betting that the United States can rebuild a domestic semiconductor ecosystem capable of supporting not just consumer electronics but the full spectrum of AI-driven hardware.
The broader implication is that the AI supply chain is becoming geographically and strategically concentrated. Just as Silicon Valley dominated software in the 2000s and 2010s, the Grimes County corridor could emerge as the dominant hub for AI hardware in the 2030s. The Terafab's scale — combined with Tesla's existing Gigafactory in Austin and SpaceX's Starbase in Boca Chica — effectively creates a Texas triangle of AI infrastructure that no other state or country can currently match. The question is whether the $85 billion investment will yield the returns Musk has promised, or whether it will become the largest stranded asset in corporate history.
Key Takeaways
- Scale is unprecedented: At 150 million square feet, the Terafab will be the largest building on Earth, dwarfing every existing industrial facility by a factor of 20 or more.
- Vertical integration is the core strategy: By producing chips, robots, vehicles, and space hardware under one roof, SpaceX and Tesla bypass traditional supply chain vulnerabilities.
- Texas wins the AI manufacturing race: The $4.7 billion incentive package and fast-tracked permitting secured the project for Grimes County, cementing Texas as the centre of US AI hardware production.
- Timeline extends to 2033: Full operational capacity, including the orbital data centre constellation, will not be reached for at least seven years — making this a multi-decade bet on Musk's long-term vision.
