Optimus production starts at Fremont on the line that built Model S and X
Tesla is converting the Fremont Model S and X line — which ended production in May — to build Optimus, with the V3 reveal timed to the start of manufacturing. Musk has set a one-million-unit annual run rate at Fremont as the goal while warning initial output will be slow, citing roughly 10,000 unique parts on an entirely new line.
Reusing the S and X line is the most informative detail in the announcement. It is a real automotive assembly line with real tooling, supply chain and trained staff, and converting it is a considerably stronger commitment than building a pilot cell. It is also a decision that is expensive to reverse.
The warning attached to the target is worth as much as the target. Ten thousand unique parts on a new line is a supply-chain problem before it is a robotics problem, and the gap between a million-unit ambition and unpredictable initial output is where every manufacturing ramp in history has actually lived.
Timing the V3 reveal to production start rather than ahead of it is a change of posture. Revealing at production means the thing shown is the thing being built, which invites a comparison with what eventually ships — a comparison the industry's demo-first convention has generally avoided.
Electrek — Tesla pushes Optimus V3 reveal later this year — again → · Yahoo Finance — Optimus 3: Musk teases plans for unveiling → · AIFOD — Tesla Optimus production begins at Fremont assembly plant in July 2026 →