GR-3 vs K3 Bumblebee
Humanoid robot spec comparison — Fourier Intelligence vs Kepler Robotics.
Fourier Intelligence
GR-3
67 / 100 Robo2u Score
Care-focused companion humanoid from Fourier Intelligence with cushioned surfaces
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 | GR-3 | K3 Bumblebee |
|---|---|---|
| Released | 2025-08 | 2026-07 |
| Status | Production | Pilot |
| Height | 165 cm | — |
| Payload | 3 kg | 30 kg |
| Degrees of freedom | 55 | — |
| Runtime | 180 min | 480 min |
| Top speed | — | — |
| Price | — | — |
| Robo2u Score | 67 | 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.
