Phoenix Hand (hydraulische Hand, a third-party aggregator: 3.2)

Hydraulics instead of motors: the hand of Sanctuary AI's Phoenix humanoid is driven by miniaturised hydraulic valves of the company's own design, which the maker says have been tested for more than two billion cycles. Sanctuary quotes 21 degrees of freedom; the version label 3.2 and a figure of 17 degrees come from third-party listings, not from the Vancouver company itself.

The hand exists only as part of Sanctuary AI Phoenix and is not sold separately, so it remains a prototype in catalogue terms. Two milestones are documented: in-hand manipulation in December 2024 and, in April 2026, zero-shot cube reorientation with a reinforcement-learning policy trained in simulation and transferred to the real hand without further training.

Control runs through Carbon, Sanctuary's AI system. Weight, grip force, payload, sensors and interfaces are not published, and any circulating prices are estimates rather than offers. Electric hands such as XHAND1 Pro reach a similar joint count with in-hand motors, while Clone Hand pursues artificial muscles as yet another route.