Walker S2 vs G1
UBTECH Robotics Walker S2 and Unitree Robotics G1 compared on the same basis. Each value shows how sure we are of it, so a reported figure is not read as an official one.
- Height: Walker S2 176 cm · G1 132 cm (44 cm apart)
- Weight: Walker S2 70 kg · G1 35 kg (35 kg apart)
- Total degrees of freedom: Walker S2 52 · G1 23 (29 apart)
- Payload: Walker S2 15 kg · G1 2 kg (13 kg apart)
| Item | Walker S2 | G1 |
|---|---|---|
| Company | UBTECH Robotics | Unitree Robotics |
| Stage | Production | On sale |
| Height cm | 176 Reported | 132 Official |
| Weight kg | 70 Reported | 35 Official |
| Total degrees of freedom | 52 Reported | 23 Official |
| Arm DoF (per arm) | — | 5 Official |
| Leg DoF (per leg) | — | 6 Official |
| Waist DoF | — | 1 Official |
| Max joint torque N·m | — | 120 Official |
| Actuation | Electric Reported | Electric Official |
| Walking speed km/h | 7.2 Reported | — |
| Top speed km/h | 7.2 Reported | 7.2 Reported |
| Hand DoF (per hand) | 11 Reported | 7 Official |
| Fingers | 5 Reported | 3 Official |
| Payload kg | 15 Official | 2 Official |
| Tactile sensors | — | Optional tactile sensor array on the Dex3-1 hand available with EDU Official |
| Runtime h | 2 Reported | 2 Official |
| Battery kWh | 2.3 Reported | 0.43 Estimate |
| Battery swap | Autonomous hot-swap (dual batteries, about 3 minutes) Official | Swappable (quick-release smart battery) Official |
| Compute unit | — | 8-core high-performance CPU (EDU: optional high-performance compute module such as Jetson Orin) Official |
| Cameras | 2 Official | 1 Reported |
| Lidar | — | 3D LiDAR (Livox MID-360) Official |
| Sensors | Pure RGB binocular stereo vision in the head (deep-learning depth estimation) Official | Depth camera, 3D lidar, 4-microphone array, 5W speaker Official |
| AI model | 'Dual loop' of Co-Agent (industrial humanoid agent) + BrainNet 2.0 swarm intelligence, Thinker physical AI foundation model and Thinker-WM industrial world model Official | UnifoLM (Unitree unified robot large model) — open-source UnifoLM-WMA-0 (world model-action, 2025-09), UnifoLM-VLA-0 (VLA model based on Qwen2.5-VL, 2026-01, trained on G1 manipulation data and released) Official |
| SDK & dev tools | — | unitree_sdk2 (C++/Python/Rust), custom development supported on EDU Official |
| Open resources | — | URDF (unitree_ros), SDK2, unitree_rl_gym/rl_lab, unitree_mujoco, UnifoLM models Official |
| Price | $90,000 Rumor | $13,500 Official |
| Production & shipments | 1,079 full-size humanoids sold in 2025 (revenue 821 million yuan, +2,203.7%), Walker S annual capacity of 6,000+ units at the end of 2025. 921 units sold in H1 2026 (revenue 590.3 million yuan, 46.5% of group revenue). Target of 10,000 full-size units produced in 2026 Reported | Unitree shipped 5,500+ humanoids in 2025 (excluding wheeled, whole company), 5,632 cumulatively in 2023–2025. 410 humanoids sold in G1's first year on sale (2024) Reported |