Iron 2 vs Walker S1
Humanoid robot spec comparison — XPENG vs UBTECH.
| Spec | Iron 2 | Walker S1 |
|---|---|---|
| Released | 2025-11 | 2024-10 |
| Status | Prototype | Deployed |
| Height | 178 cm | 172 cm |
| Payload | — | 15 kg |
| Degrees of freedom | 82 | 41 |
| Runtime | — | 120 min |
| Top speed | 2 m/s | 0.83 m/s |
| Price | — | — |
| Robo2u Score | 61 | 71 |
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.
