Kepler Forerunner K2 "Bumblebee" vs Unitree R1
Generated from the registry · revision 2026-09-26 · openness out of 100
Kepler Forerunner K2 "Bumblebee" is 52 cm taller (175 vs 123 cm) and 46 kg heavier (75 vs 29 kg) than Unitree R1. Kepler Forerunner K2 "Bumblebee" has 26 more degrees of freedom (52 vs 26) than Unitree R1. Listed prices: Kepler Forerunner K2 "Bumblebee" $30,000, Unitree R1 $5,900. Openness score: Kepler Forerunner K2 "Bumblebee" 0, Unitree R1 30 (of 100); only Unitree R1 publishes SIM and SW. Availability for both: buy.
01
Side by side
■ rows differ| Field | Kepler Robotics (Shanghai Kepler Exploration Robot Co.)Kepler Forerunner K2 "Bumblebee" | Unitree RoboticsUnitree R1 | Δ first − second |
|---|---|---|---|
| Identity | |||
| Maker (differs) | Kepler Robotics (Shanghai Kepler Exploration Robot Co.) | Unitree Robotics | |
| Class | Humanoid | Humanoid | |
| Status | Active | Active | |
| Availability | Buy | Buy | |
| Country | China | China | |
| Year (differs) | 2024 | 2025 | |
| Specifications | |||
| Height (differs) | 175cm | 123cm | +52 cm (+42%) |
| Mass (differs) | 75kg | 29kg | +46 kg (+159%) |
| Degrees of freedom (differs) | 52 | 26 | +26 (+100%) |
| Payload | 30kg | —unsourced | |
| Top speed | —unsourced | —unsourced | |
| Runtime (differs) | 480min | 60min | +420 min (+700%) |
| Battery capacity | 2,330Wh | —unsourced | |
| Price (differs) | 30,000USD | 5,900USD | +24,100 USD (+408%) |
| Actuators (differs) | Hybrid roller-screw linear + rotary actuators | Unitree in-house electric joint motors | |
| Compute (differs) | 100 TOPS onboard | 8-core CPU; optional Jetson Orin (40-100 TOPS) | |
| Sensors (differs) | 80+ integrated sensors; tactile dexterous hands | 4-mic array, monocular or binocular camera, joint encoders | |
| Openness and provenance | |||
| Openness bar | |||
| Openness score (differs) | 0/ 100 | 30/ 100 | −30 |
| CAD (25) | not public | not public | |
| Bill of materials (20) | not public | not public | |
| Sim model (URDF/MJCF) (20) (differs) | not public | public | |
| Firmware (15) | not public | not public | |
| Software (10) (differs) | not public | public | |
| Trained policies (10) | not public | not public | |
| Verification level (differs) | L0 | L1 | |
| Sources | 2 | 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: Kepler Forerunner K2 "Bumblebee", Unitree R1.
02
Related comparisons
Kepler Forerunner K2 "Bumblebee"vsApptronik ApolloKepler Forerunner K2 "Bumblebee"vsHumanoid HMND 01Kepler Forerunner K2 "Bumblebee"vsMenteeBotKepler Forerunner K2 "Bumblebee"vsNEURA 4NE1Kepler Forerunner K2 "Bumblebee"vsHyperspawn DropbearUnitree R1vsNoetix N2Unitree R1vsBooster T1Unitree R1vsAgiBot Lingxi X1Unitree R1vsRoboParty ROBOTO_ORIGIN