Overview

Released in March 2025 as Fourier's first open-source humanoid, publishing designs and software to encourage community research. Compact and sturdy, aimed at RL locomotion work.

Specifications

Category	Bipeds · Kid-size humanoids (≤ 1.3 m)
Released	2025
Availability	Available
Programmability	Open source (hardware + software)
Best for	Professionals & labs
Vision sensors	Depth camera, Camera
Actuators	Brushless / direct-drive motors
Audio	Unknown
Compute type	x86 PC (Intel / AMD)
Balance type	RL walking
Height	124.5 cm
Weight	~39 kg
Compute	Intel Core i7-13700H, 16 GB RAM, Ubuntu 20.04
Speed	2.7 km/h walking, 10.8 km/h (3 m/s) running
DOF	23
Sensors	6-axis IMU, optional binocular depth camera
Balance	RL locomotion. Fourier published training code and demos of running.
SDK	Open-source hardware package (schematics, BOM, assembly manuals) and base control code