ROBOTIS OP3 vs Stanford ToddlerBot
Generated from the registry · revision 2026-09-26 · openness out of 100
ROBOTIS OP3 is 5 cm shorter (51 vs 56 cm) and 0.1 kg heavier (3.5 vs 3.4 kg) than ToddlerBot. ROBOTIS OP3 has 10 fewer degrees of freedom (20 vs 30) than ToddlerBot. Openness score: ROBOTIS OP3 45, ToddlerBot 100 (of 100); only ToddlerBot publishes CAD, BOM and POL. Availability: ROBOTIS OP3 buy, ToddlerBot diy build.
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Side by side
■ rows differ| Field | ROBOTISROBOTIS OP3 | Stanford UniversityStanford ToddlerBot | Δ first − second |
|---|---|---|---|
| Identity | |||
| Maker (differs) | ROBOTIS | Stanford University | |
| Class | Humanoid | Humanoid | |
| Status (differs) | Active | Research | |
| Availability (differs) | Buy | DIY build | |
| Country (differs) | South Korea | United States | |
| Year | —unsourced | 2025 | |
| Specifications | |||
| Height (differs) | 51cm | 56cm | −5 cm (-9%) |
| Mass (differs) | 3.5kg | 3.4kg | +0.1 kg (+3%) |
| Degrees of freedom (differs) | 20 | 30 | −10 (-33%) |
| Payload | —unsourced | 1.48kg | |
| Top speed | —unsourced | —unsourced | |
| Runtime | —unsourced | —unsourced | |
| Battery capacity | 36.6Wh | —unsourced | |
| Price | —unsourced | —unsourced | |
| Actuators (differs) | 20x Dynamixel XM430-W350-R | servo actuators; 7 DOF/arm, 6 DOF/leg, 2 neck, 2 waist | |
| Compute (differs) | Intel NUC i3, 8GB RAM | NVIDIA Jetson Orin NX 16GB | |
| Sensors | Logitech C920 camera, 9-axis IMU | —unsourced | |
| Openness and provenance | |||
| Openness bar | |||
| Openness score (differs) | 45/ 100 | 100/ 100 | −55 |
| CAD (25) (differs) | not public | public | |
| Bill of materials (20) (differs) | not public | public | |
| Sim model (URDF/MJCF) (20) | public | public | |
| Firmware (15) | public | public | |
| Software (10) | public | public | |
| Trained policies (10) (differs) | not public | public | |
| Verification level | L2 | L2 | |
| Sources (differs) | 2 | 3 | |
| Last checked (differs) | 2026-09-24 | 2026-09-25 | |
A dash is an unsourced figure, not zero. Sources for each robot are listed on its spec sheet: ROBOTIS OP3, ToddlerBot.
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