On Tesla's first-quarter earnings call on April 22, CEO Elon Musk told investors, "I think Optimus will be our biggest product, not just Tesla's biggest product ever, but probably the biggest product ever," and separately floated a figure of up to $10 trillion in long-term sales for the project. Optimus is Tesla's humanoid robot, and the Model S and Model X production lines in Fremont, California, have been decommissioned to make way for Optimus production, with a second site at Gigafactory Texas being prepared for a purported eventual capacity of 10 million units annually. In January 2025, Musk said of that year's Optimus output: "Will we succeed in making several thousand? Yes, I think we will," but a year later, in the company's Q1 call, Musk acknowledged the production timeline had been pushed out, saying the first robots off the Fremont line will come "later this year." The first robots are destined for an internal program called "Optimus Academy," remaining in the research and development phase. Second-quarter capital expenditures hit $5.79 billion, up 142% from a year ago, pushing free cash flow to negative $1.09 billion, and Tesla reaffirmed capex guidance of more than $25 billion for 2026, with FCF expected to stay negative for the full year.