Elon Musk says Tesla (TSLA) will stop Model S and X EV production next quarter Musk shared that Tesla will be converting its Fremont vehicle plant to Optimus robotics production lines during the company's Q4 2025 conference call. Elon Musk announced a surprising decision by the Tesla company as part of his opening remarks in the Tesla Q4 2025 earnings results conference call. The Tesla Model S and X vehicles will be discontinued. We’ll obviously continue to support the Model X and S programs for as long as people have the vehicles. During the Tesla Q4 2025 earnings call, Elon has announced that the production of Tesla Model S & X vehicles are coming to an end.