K3 Bumblebee vs U1
Humanoid robot spec comparison — Kepler Robotics vs UBTECH.
Kepler Robotics
K3 Bumblebee
79 / 100 Robo2u Score
Successor to the Forerunner K2 with an added waist joint, 30 kg dual-arm lifting and eight-hour shifts
UBTECH
U1
79 / 100 Robo2u Score
Full-size ultra-realistic companionship humanoid from UBTech with a lifelike appearance
| Spec | K3 Bumblebee | U1 |
|---|---|---|
| Released | 2026-07 | 2026-06 |
| Status | Pilot | Pre-order |
| Height | — | — |
| Payload | 30 kg | — |
| Degrees of freedom | — | 88 |
| Runtime | 480 min | — |
| Top speed | — | — |
| Price | — | $17.6k |
| Robo2u Score | 79 | 79 |
Highlighted = better on that spec (lower is better for price and weight; newer for release). The Robo2u Score is a transparent composite — see the Humanoid Showdown for the full field.
