Tesla Poised to End Model S and X Production, Rework Fremont Floor for Optimus

Tesla plans to end production of the Model S and Model X and convert the freed-up space at its Fremont, California plant to build the Optimus humanoid robot, Assembly Magazine reports.

The move would retire Tesla's two longest-running nameplates. The Model S, launched in 2012, and the Model X, launched in 2015, were both built at Fremont — the former NUMMI (New United Motor Manufacturing, the GM-Toyota joint venture plant Tesla bought in 2010) site that remains Tesla's only California assembly operation.

For manufacturing practitioners, the significance is less about the cars than about the floor space. Fremont has long run near capacity constraints across Model 3, Model Y, Model S and Model X output on a footprint Tesla has described as cramped compared with Austin and Shanghai. Pulling two low-volume sedans out of the mix frees assembly, body and paint capacity in a high-cost, high-regulation labor market — and redirects it toward a product that is not a car at all.

What does this change for the Fremont operation?

The conversion marks the clearest signal yet that Tesla treats Optimus (its humanoid robot program, unveiled as a concept in 2021) as a volume manufacturing program rather than a research effort. Robots assembled on a former automotive line would imply a new set of production processes, fixtures, takt times and supplier inputs — little of which is automotive in character.

It also raises workforce questions. Fremont employs thousands of California production workers, and a shift from vehicle assembly to robot assembly would change skill requirements, headcount mix and possibly total jobs on site. Tesla has not publicly detailed the timing of the phase-out, the investment in the conversion, or projected Optimus volumes at Fremont.

How firm is the plan?

Treat this as an announced intention, not a confirmed production schedule. The report does not specify when Model S and X output would stop, and Tesla routinely shifts program timing. Both nameplates have already absorbed repeated reports of cancellation over the years while continuing in limited production.

Still, the logic is consistent with Tesla's recent posture. The company refreshed neither flagship with the frequency of its volume models, and both occupy engineering and floor resources disproportionate to their sales contribution.

What to watch next: an official Tesla confirmation with a stop-build date for Model S and X, any Tesla statement on Optimus production volumes or hiring at Fremont, and supplier notices tied to the robot program's part sets. Until Tesla publishes numbers, the conversion remains a plan — one with major implications for California manufacturing, but a plan.