A3 Ultra vs K3 Bumblebee
Humanoid robot spec comparison — AgiBot vs Kepler Robotics.
AgiBot
A3 Ultra
56 / 100 Robo2u Score
51-DOF full-size service humanoid with lidar, RTK and UWB navigation and autonomous charging, unveiled at WAIC 2026
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
| Spec | A3 Ultra | K3 Bumblebee |
|---|---|---|
| Released | 2026-07 | 2026-07 |
| Status | Prototype | Pilot |
| Height | 174 cm | — |
| Payload | 5 kg | 30 kg |
| Degrees of freedom | 51 | — |
| Runtime | 480 min | 480 min |
| Top speed | — | — |
| Price | — | — |
| Robo2u Score | 56 | 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.
