Kepler Forerunner K2 "Bumblebee" vs Stanford ToddlerBot
Generated from the registry · revision 2026-09-26 · openness out of 100
Kepler Forerunner K2 "Bumblebee" is 119 cm taller (175 vs 56 cm) and 71.6 kg heavier (75 vs 3.4 kg) than ToddlerBot. Kepler Forerunner K2 "Bumblebee" has 22 more degrees of freedom (52 vs 30) and 28.52 kg more rated payload (30 vs 1.48 kg) than ToddlerBot. Openness score: Kepler Forerunner K2 "Bumblebee" 0, ToddlerBot 100 (of 100); only ToddlerBot publishes CAD, BOM, SIM, FW, SW and POL. Availability: Kepler Forerunner K2 "Bumblebee" buy, ToddlerBot diy build.
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Side by side
■ rows differ| Field | Kepler Robotics (Shanghai Kepler Exploration Robot Co.)Kepler Forerunner K2 "Bumblebee" | Stanford UniversityStanford ToddlerBot | Δ first − second |
|---|---|---|---|
| Identity | |||
| Maker (differs) | Kepler Robotics (Shanghai Kepler Exploration Robot Co.) | Stanford University | |
| Class | Humanoid | Humanoid | |
| Status (differs) | Active | Research | |
| Availability (differs) | Buy | DIY build | |
| Country (differs) | China | United States | |
| Year (differs) | 2024 | 2025 | |
| Specifications | |||
| Height (differs) | 175cm | 56cm | +119 cm (+213%) |
| Mass (differs) | 75kg | 3.4kg | +71.6 kg (+2106%) |
| Degrees of freedom (differs) | 52 | 30 | +22 (+73%) |
| Payload (differs) | 30kg | 1.48kg | +28.52 kg (+1927%) |
| Top speed | —unsourced | —unsourced | |
| Runtime | 480min | —unsourced | |
| Battery capacity | 2,330Wh | —unsourced | |
| Price | 30,000USD | —unsourced | |
| Actuators (differs) | Hybrid roller-screw linear + rotary actuators | servo actuators; 7 DOF/arm, 6 DOF/leg, 2 neck, 2 waist | |
| Compute (differs) | 100 TOPS onboard | NVIDIA Jetson Orin NX 16GB | |
| Sensors | 80+ integrated sensors; tactile dexterous hands | —unsourced | |
| Openness and provenance | |||
| Openness bar | |||
| Openness score (differs) | 0/ 100 | 100/ 100 | −100 |
| CAD (25) (differs) | not public | public | |
| Bill of materials (20) (differs) | not public | public | |
| Sim model (URDF/MJCF) (20) (differs) | not public | public | |
| Firmware (15) (differs) | not public | public | |
| Software (10) (differs) | not public | public | |
| Trained policies (10) (differs) | not public | public | |
| Verification level (differs) | L0 | 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: Kepler Forerunner K2 "Bumblebee", ToddlerBot.
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