A3 Ultra vs Forerunner K2
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
Forerunner K2
83 / 100 Robo2u Score
Industrial general-purpose humanoid from Kepler Robotics with strong dexterous manipulation
| Spec | A3 Ultra | Forerunner K2 |
|---|---|---|
| Released | 2026-07 | 2024-10 |
| Status | Prototype | Production |
| Height | 174 cm | 178 cm |
| Payload | 5 kg | 30 kg |
| Degrees of freedom | 51 | 52 |
| Runtime | 480 min | 480 min |
| Top speed | — | 1.1 m/s |
| Price | — | $30k |
| Robo2u Score | 56 | 83 |
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.
