Optimus: a humanoid robot from prototype to production line

The hardware line

Optimus was announced at Tesla's AI Day on 19 August 2021, and a walking prototype was demonstrated at the following AI Day in September 2022. Optimus Gen 2 was unveiled on 12 December 2023: lighter, with a faster walking gait, improved neck and feet, eleven degrees of freedom in the hands with tactile sensing, roughly 180cm tall and about 55kg, with a 2.3kWh pack and a vision-first perception stack derived from the FSD software line.

Reusing the vehicle autonomy stack is the programme's central engineering bet. The same occupancy and planning machinery that navigates an intersection is applied to a manipulation workspace. The bet is plausible for locomotion and coarse navigation, and considerably less obviously right for contact-rich manipulation, where force feedback rather than vision dominates.

“The constraint will not be manufacturing. It is the absent discipline for assuring learned manipulation near people.”

The production line

Tesla began converting its Fremont Model S and X production line into an Optimus assembly line during 2026; the teardown was reported completed in 46 days, with a milestone photograph posted around 1 July 2026. Reporting in July 2026 indicated Musk had asked suppliers to prepare for capacity of 100,000 units per year by the end of 2026 following Gen 3 design decisions — a capacity target, not a shipment figure.

At a meeting at Fremont reported on 20 August 2026, Tesla indicated that commercial Optimus sales are now expected to begin in 2027. Independent analyses count zero commercial units sold to date. There is no published Gen 3 specification sheet, and the long-standing sub-$20,000 unit price target has not been reaffirmed with a date.

The competence gap

If humanoid robots reach industrial deployment at anything like the announced volumes, the constraint will not be manufacturing. It will be the absence of an established discipline for assuring learned manipulation policies operating within reach of people.

Existing industrial safety standards were written for robots that are caged or that operate under speed and separation monitoring with deterministic controllers. A general-purpose learned policy fits neither model. ACS has begun scoping a competence standard for engineers who authorise such systems for shared workspaces; the Society would rather define it before a serious incident than after one.