Tesla Clears Fremont Model S and X Line for Optimus in 46 Days

FREMONT, Calif. — Tesla has torn down the assembly line that built its first flagship cars and cleared the space in just 46 days, marking the physical start of one of the company's most ambitious pivots yet: high-volume production of the Optimus humanoid robot.

In a time-lapse video captioned "End of an era," Tesla showed heavy machinery dismantling concrete pits, pulling out robotic arms and conveyors, and stripping the historic Model S and Model X line at its Fremont Factory down to bare floor. The speed of the teardown, documented by the company's manufacturing team, underscores how quickly Tesla intends to move from cars to robots on the same ground.

From Flagship Cars to Humanoid Robots

The Model S and Model X defined Tesla's rise, with the Model S launching in 2012 and establishing the company as a serious force in the premium EV segment. CEO Elon Musk announced during the Q4 2025 earnings call that production of both vehicles would wind down by the end of the second quarter of 2026, describing the move as an "honorable discharge" for the two cars. Custom orders closed in early April, and the final units rolled off the line in May.

Rather than let prime factory space sit idle, Tesla is repurposing it for Optimus, the general-purpose humanoid robot Musk has repeatedly called potentially the company's largest product ever. The Fremont line is being rebuilt as a dedicated Optimus manufacturing line targeting a capacity of roughly one million units per year over time. That focus on robotics dovetails with Tesla's broader shift toward autonomy and AI, the same strategy powering its fast-expanding driverless robotaxi service now running in multiple markets.

Production Ramp Begins Soon

Production of Optimus Gen 3 is already underway in limited form at Fremont, with full-scale output on the converted line expected to begin in late July or August. Tesla is targeting rapid scaling, with internal ambitions pointing toward tens or even hundreds of thousands of units annually by the end of 2026.

The Fremont line is only the first stage. Tesla is separately constructing a much larger second-generation Optimus facility at Giga Texas, with potential capacity reaching millions of units per year. Musk has framed the robot as a transformative platform that could eventually surpass the automotive business in scale and value, a theme that runs alongside the company's tightly guarded Optimus V3 reveal planned for late July.

Why the Speed Matters

A 46-day teardown of a fully tooled vehicle line is a striking display of Tesla's manufacturing agility. Retooling an existing plant is typically measured in quarters, not weeks, and the pace signals that the company views the Optimus ramp as urgent rather than experimental. The full time-lapse and details were shared by Teslarati, which noted the space is being cleared specifically for the humanoid program.

As one chapter of Tesla history closes at Fremont, another is taking shape on the same floor. If the ramp holds to schedule, the birthplace of the Model S could soon be turning out the robots Musk believes will become the most popular product of all time.