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Closed hardware

ROBOTIS OP3

ROBOTIS · Humanoid · active

Small 20-DOF open-platform humanoid (~51 cm, 3.5 kg) built on Dynamixel XM430 servos and an Intel NUC, with open ROS software and URDF.

L2Sim-verifiedGate: Loads in browser and GPU sim, mass within tolerance of the BOM, holds a stand. Unlocks .training.

Two ways to get ROBOTIS OP3

Compare all →
  1. 1Buy assembledPrice on requestFrom robotis.com
  2. 2Build Pupper v3 instead$2,043 BOMNearest open robot · 3 kg
Fig 1/5RenderROBOTIS OP3 studio render, three-quarter front view
Studio render of the published MJCF, the model's zero pose. Geometry only; colours are the model's own materials.© Rendered by Hyperspawn from mujoco_menagerie/robotis_op3 (Apache-2.0) · Hyperspawn render · source
Drawing
/robotis/op3
Maker
ROBOTIS
Country
Seoul, KR
Package rev
none
Level
L2 Sim-verified
Availability
Buy
Openness
45/100
HW licence
unknown
Last checked
2026-09-24
Height
51 cm
Mass
3.5 kg
DOF
20
Actuators
20x Dynamixel XM430-W350-R

Battery 11.1V 3300mAh LiPo (~36.6 Wh computed). e-Manual notes a 2025 ROS 2 re-release. Original release year and CAD availability not verified in fetched sources.

Build · not possible

Build it. Buy it, or build something like it.

Closed hardware. Buy link only.

Availability
Buy
Indicative price
unknown
Maker site: robotis.com →Its sim model is open: train it →

Open robots of similar size you can build

Nearest by height and mass where both are known; otherwise same class. Size comparison only, not capability.

GATE

Level gate

Holds L2 · evidence, not confidence
  1. L0
    Indexed

    Known to exist. Atlas page only.

    • 2 sources on record(met)
    held
  2. L1
    Compiled

    Package validates against the spec; every fact has a source.

    • No build package compiled(not met)
    • 2 sources across robot and package(met)
    held
  3. L2
    Sim-verified

    Loads in browser and GPU sim, mass within tolerance of the BOM, holds a stand. Unlocks .training.

    • URDF/MJCF is public(met)
    • Sim load, mass tolerance and stand are checked on .training(checked elsewhere)
    held
  4. L3
    Sourced

    Every BOM line resolves to a live offer in at least two regions. Unlocks the one-click cart.

    • Not reachable: no open hardware to source or build.
    next
  5. L4
    Built

    At least one community build report with photos and bring-up logs. Unlocks Build it as the main action.

    • Not reachable: no open hardware to source or build.
    locked
  6. L5
    Certified

    The robot's maintainer signs the package. Unlocks certified teams and kit sales.

    • Not reachable: no open hardware to source or build.
    locked

Levels are cumulative and set by the registry from reviewed evidence. This panel shows what can be measured from the package today.

Same robot, other verbs

REV

Revisions and sources

Every fact on this sheet traces to one of these
RevDescriptionChecked
PKGNo build package compiled—
S1ROBOTIS e-Manualemanual.robotis.com2026-09-24
S2Official repogithub.com2026-09-24