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

Documentation in progress

The product identity and source are confirmed, but some specifications or interface details do not yet have citable manufacturer evidence. Missing evidence is not treated as a negative claim.

Product information

Information below comes from the product website or public documentation. Pricing and availability may change.

Category
Robot Development
Maturityi
Available
Deploymenti
Physical hardware
Source
Official websiteChecked Sep 18, 2026

Reality check

A demo shows what may be possible. These points help judge whether the product fits day-to-day use.

Works well when
  • Simulation, control, perception and repeatable experiments
  • Teams that can manage dependencies and hardware interfaces
  • Prototyping before committing to a physical deployment
What to check
  • 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.

Scenes

Software & Agent DevelopmentEducation & Research

Product details

Manufacturer / team
Hugging Face
Open sourcePublic API / SDKi

The cost iceberg

The purchase price is only one part of an automation project.

GPU, simulation assets and hardware adapters
Dependencies, datasets and test infrastructure
Version pinning, documentation and support
Sim-to-real gaps and safety validation