Fourier N1

Name: Fourier N1
Brand: Fourier Intelligence

Shipping 2025 Business

Compact fully open-source humanoid from Fourier with public BOM, CAD and code, hitting 3.5 m/s on proprietary FSA 2.0 actuators.

Overview

Fourier Intelligence launched the N1 on 11 April 2025 as the company's first fully open-source humanoid, publishing the complete bill of materials, CAD/STEP files, assembly instructions and base operating software on GitHub under its Nexus open-source ecosystem. The compact 1.3 m, 38 kg robot has 23 degrees of freedom driven by Fourier's self-developed FSA 2.0 integrated actuators, runs at up to 3.5 m/s, and its swappable back-mounted battery supports over 2 hours of continuous operation, validated by 1,000+ hours of outdoor testing. Built from aluminum alloy and engineering plastics, it targets developers, universities and research labs alongside Fourier's commercial GR-series humanoids.

Use cases

Open-source R&D Education Robotics research

Capability evidence

Cartwheel and 360° jump

Fourier released a clip of the N1 performing a cartwheel and a 360° spinning jump, showing dynamic whole-body control. Interesting Engineering ↗ · 2025-09
High-speed running

Open-source compact humanoid demonstrated running at up to 3.5 m/s at launch. Humanoids Daily ↗ · 2025-04

Fourier N1 in the news

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Launches & Prices

Cross-Embodiment AI Advances for the Fourier N1 and Peers

New cross-embodiment AI research enables robots like the Fourier N1 to transfer learned skills between different physical forms, potentially solving the industry's biggest scaling hurdle.

In context