The Model S sedan and Model X SUV will be discontinued next quarter, CEO Elon Musk said on the company's earnings call on Wednesday. Tesla plans to convert the space at its Fremont, California, factory where the Model S and Model X are built into a facility to produce Optimus humanoid robots instead. The production space where the Model S and X are currently produced will eventually churn out 1 million Optimus robots annually, Musk claimed. The Tesla Model X launched in 2015 with gull-wing doors. The pricey Model S and Model X have made up a dwindling portion of Tesla's sales globally in recent years.