SO-101 is Hugging Face LeRobot's flagship robot arm, documented with assembly, motor setup, and calibration instructions.

Product passport

Key facts are transcribed from official pages or public documentation. Access and pricing can change, so confirm them before acting.

Category: Robot Development
Maturityi: Available
Deploymenti: Not specified
Purchase access: Public purchase / signup
Official source: Official website
Verifiedi: Not yet verified

Reality check

The useful boundary is what works repeatedly in a real environment—not what looks impressive in a demo.

Works well when

Simulation, control, perception and repeatable experiments
Teams that can manage dependencies and hardware interfaces
Prototyping before committing to a physical deployment

Verify before buying

Supported hardware, GPU requirements and version compatibility
Documentation, examples and community response
How simulation results transfer to the real robot

Not a magic solution

A guarantee that simulation equals a production cell
A replacement for safety validation on hardware
A low-maintenance toolchain without version ownership

About

SO-101 is the flagship robot arm of Hugging Face's LeRobot project, documented in the LeRobot repository. The guide covers sourcing and 3D printing parts, installing LeRobot with the Feetech SDK, configuring motor IDs and baudrates, assembling the leader and follower arms, and calibrating both arms. The follower arm uses six STS3215 motors with 1/345 gearing, while the leader arm uses differently geared motors across its joints. Calibration aligns leader and follower position values so a neural network trained on one robot can work on another.