UC Berkeley Humanoid vs Kepler Forerunner K2 "Bumblebee"
Generated from the registry · revision 2026-09-26 · openness out of 100
Berkeley Humanoid is 90 cm shorter (85 vs 175 cm) and 59 kg lighter (16 vs 75 kg) than Kepler Forerunner K2 "Bumblebee". Berkeley Humanoid has 40 fewer degrees of freedom (12 vs 52) than Kepler Forerunner K2 "Bumblebee". Kepler Forerunner K2 "Bumblebee" lists at $30,000; Berkeley Humanoid is not for sale. Openness score: Berkeley Humanoid 30, Kepler Forerunner K2 "Bumblebee" 0 (of 100); only Berkeley Humanoid publishes SIM and SW. Availability: Berkeley Humanoid research only, Kepler Forerunner K2 "Bumblebee" buy.
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Side by side
■ rows differ| Field | UC Berkeley Hybrid Robotics LabUC Berkeley Humanoid | Kepler Robotics (Shanghai Kepler Exploration Robot Co.)Kepler Forerunner K2 "Bumblebee" | Δ first − second |
|---|---|---|---|
| Identity | |||
| Maker (differs) | UC Berkeley Hybrid Robotics Lab | Kepler Robotics (Shanghai Kepler Exploration Robot Co.) | |
| Class (differs) | Biped | Humanoid | |
| Status (differs) | Research | Active | |
| Availability (differs) | Research only | Buy | |
| Country (differs) | United States | China | |
| Year | 2024 | 2024 | |
| Specifications | |||
| Height (differs) | 85cm | 175cm | −90 cm (-51%) |
| Mass (differs) | 16kg | 75kg | −59 kg (-79%) |
| Degrees of freedom (differs) | 12 | 52 | −40 (-77%) |
| Payload | —unsourced | 30kg | |
| Top speed | —unsourced | —unsourced | |
| Runtime | —unsourced | 480min | |
| Battery capacity | —unsourced | 2,330Wh | |
| Price (differs) | Not for sale | 30,000USD | |
| Actuators (differs) | custom 5013/8513/8518/10413 motors, 9:1 planetary, EtherCAT | Hybrid roller-screw linear + rotary actuators | |
| Compute (differs) | Intel i7-1255U onboard PC | 100 TOPS onboard | |
| Sensors (differs) | IMU, joint encoders | 80+ integrated sensors; tactile dexterous hands | |
| Openness and provenance | |||
| Openness bar | |||
| Openness score (differs) | 30/ 100 | 0/ 100 | +30 |
| CAD (25) | not public | not public | |
| Bill of materials (20) | not public | not public | |
| Sim model (URDF/MJCF) (20) (differs) | public | not public | |
| Firmware (15) | not public | not public | |
| Software (10) (differs) | public | not public | |
| Trained policies (10) | not public | not public | |
| Verification level (differs) | L2 | L0 | |
| Sources (differs) | 3 | 2 | |
| Last checked | 2026-09-24 | 2026-09-24 | |
A dash is an unsourced figure, not zero. Sources for each robot are listed on its spec sheet: Berkeley Humanoid, Kepler Forerunner K2 "Bumblebee".
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