Tesla has ramped production of its Optimus humanoid robot to several hundred units per week, marking a tenfold increase from second-quarter output, when the company was producing only a few dozen weekly. Managers are targeting a continuous automated line capable of producing more than 1,000 robots per week by year-end, with long-term aspirations of 20,000 weekly.
The production surge came at a cost: Tesla converted its Fremont assembly line previously used for Model S and Model X manufacturing, halting those vehicles in May. Engineers and workers from those programs, along with dozens from Model Y production, were reassigned to the robot initiative.
But the ramp masks three fundamental obstacles to commercialization. First, assembly: The Optimus hand and forearm involve over 100 screws and small components still assembled by hand. Production fixtures struggle to consistently align these tight-tolerance parts compared to automotive components, forcing extensive rework after robots leave the line. Tesla plans to introduce a replaceable sensing glove next year to address hand sensor reliability issues—a Band-Aid approach that sidesteps the underlying manufacturing inconsistency problem.
Second, the supply chain fractures at volume. Tesla relies on external suppliers, many China-based, for critical motors and precision gears. These suppliers have delivered quality parts in prototype quantities but struggle to maintain consistency at higher production volumes—a classic China-to-scale challenge that suggests Tesla's 1,000-per-week target may be optimistic.
Third, the AI foundation remains unstable. The Optimus system cannot reliably manage a broad array of tasks and behaves unpredictably in unfamiliar situations. Tesla is developing a library of basic movements the robot can combine for new jobs, but Optimus reportedly takes several days to learn even fundamental tasks. The company has amassed over 500,000 hours of training data, yet the behavior remains constrained to tightly controlled, supervised environments for specific tasks—far from the general-purpose capability Musk has promised.
The V3 iteration now in production is not the commercial version. Tesla must first satisfy stricter durability and reliability thresholds before launch.
Tesla shares closed at $370.96, down 1.8 percent.
