Both the Model S and X will be built at Tesla's Fremont factory in California. The NUMMI plant used to belong to GM/Toyota
. Tesla moved into the plant about a year ago and they have fitted and equipped the place to manufacture multiple body styles off the same platform from its conception. Tesla's Head of Manufacturing Gilbert Passin said "We can build many models on the same line. The Model S is just one 'top hat' on a platform that is very modular. All our pressing modules are very adjustable and we're working on improving that flexibility even further and making it faster at the moment. This plant is all about high flexibility at a low cost."