K-Scale Z-Bot (Zeroth Bot) vs Stanford ToddlerBot
Generated from the registry · revision 2026-09-26 · openness out of 100
Z-Bot (Zeroth Bot) is 10 cm shorter (46 vs 56 cm) than ToddlerBot. Z-Bot (Zeroth Bot) has 12 fewer degrees of freedom (18 vs 30) than ToddlerBot. Openness score: Z-Bot (Zeroth Bot) 90, ToddlerBot 100 (of 100); only ToddlerBot publishes POL. Availability for both: diy build.
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Side by side
■ rows differ| Field | K-Scale LabsK-Scale Z-Bot (Zeroth Bot) | Stanford UniversityStanford ToddlerBot | Δ first − second |
|---|---|---|---|
| Identity | |||
| Maker (differs) | K-Scale Labs | Stanford University | |
| Class | Humanoid | Humanoid | |
| Status (differs) | Orphaned | Research | |
| Availability | DIY build | DIY build | |
| Country | United States | United States | |
| Year | 2025 | 2025 | |
| Specifications | |||
| Height (differs) | 46cm | 56cm | −10 cm (-18%) |
| Mass | —unsourced | 3.4kg | |
| Degrees of freedom (differs) | 18 | 30 | −12 (-40%) |
| Payload | —unsourced | 1.48kg | |
| Top speed | —unsourced | —unsourced | |
| Runtime | —unsourced | —unsourced | |
| Battery capacity | —unsourced | —unsourced | |
| Price | 999USD | —unsourced | |
| Actuators (differs) | 18 servo motors | servo actuators; 7 DOF/arm, 6 DOF/leg, 2 neck, 2 waist | |
| Compute | —unsourced | NVIDIA Jetson Orin NX 16GB | |
| Sensors | cameras, IMU (per press) | —unsourced | |
| Openness and provenance | |||
| Openness bar | |||
| Openness score (differs) | 90/ 100 | 100/ 100 | −10 |
| CAD (25) | public | public | |
| Bill of materials (20) | 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 (differs) | L1 | L2 | |
| Sources | 3 | 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: Z-Bot (Zeroth Bot), ToddlerBot.
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