Fourier N1

Fourier's 2025 open-source small humanoid robot, released with full build files and a bill of materials.

Fourier N1 is Fourier's first open-source humanoid robot, released on April 11, 2025. It stands 1.31 m tall and weighs 38 kg, with 23 degrees of freedom and no dexterous hands. It can run at up to 3.5 m/s, its joints deliver up to 96 N·m of torque, a single battery lasts more than 2 hours, and the frame is built from aluminum alloy and engineering plastic. Alongside the robot, Fourier published the full bill of materials (BOM), design drawings, assembly instructions, and basic operating software, so developers can build or modify their own unit. N1 is aimed at research such as bipedal walking and reinforcement-learning locomotion control, at a much lower cost of entry than full-size humanoids.

ExampleA lab assembles its own N1 from the published BOM and drawings, trains a walking policy in Isaac Lab, and deploys it to the real robot.

Also called

N1

Related

Fourier · Open-Source Hardware (OSHW) · Small-size Humanoid Robot · Bipedal Robot · RL-based Locomotion Control · Fourier GR-2

Sources

Fourier Launches First Open-Source Humanoid Robot, Fourier N1 - AIbase
Fourier N1 open source humanoid - Webull News

As of

2025-04