Walker S2 vs A3 Ultra
Compare Walker S2 (UBTECH Robotics) and A3 Ultra (AGIBOT) side by side: degrees of freedom, weight, payload, battery life, actuators, and status.
| Spec | Walker S2 | A3 Ultra |
|---|---|---|
| Manufacturer | UBTECH Robotics | AGIBOT |
| Category | Humanoid | Humanoid |
| Country | China | China |
| Degrees of freedom | 52 | 51 |
| Weight (kg) | 70 | 60 |
| Battery life (h) | 2.5 | 8 |
| Payload | 15 kg | 5 kg |
| Max speed | 2.0 m/s | 1.8 m/s |
| Actuators | High-Torque Brushless Servo Motors | |
| Primary sensor | 3D LiDAR + Depth Camera + IMU | LiDAR + RGB-D cameras + fisheye surround view |
| Function | Assembly & manufacturing | commercial service humanoid for reception, tours, patrol and interaction |
| Released | 2025 | 2026 |
| Status | Active | Active |
Verdict
Walker S2 leads on 3 of the 4 weighted dimensions both makers disclose.
Walker S2 leads on degrees of freedom (52 vs 51), payload (15 kg vs 5 kg) and max speed (2.0 m/s vs 1.8 m/s).
A3 Ultra leads on battery life (8 h vs 2.5 h).
Left out because at least one manufacturer does not publish a figure: price.
Walker S2
Industrial humanoid with Co-Agent AI and autonomous hot-swap battery system. Mass production began late 2025 with major automotive and logistics orders.
A3 Ultra
The AGIBOT A3 Ultra is a commercial full-size humanoid robot designed for 24/7 autonomous operation in service environments. It features 700 TOPS compute, 360° perception with LiDAR and multi-camera systems, and supports tasks like reception, guidance, and inspection.