As2 vs Bittle X
Quadruped robot spec comparison — Unitree vs Petoi.
Unitree
As2
77 / 100 Robo2u Score
Compact 18 kg IP54 quadruped carrying 15 kg on the move with over four hours of unloaded runtime
Petoi
Bittle X
47 / 100 Robo2u Score
Palm-sized open-source robot dog with voice control and coding in Python, C++ or Scratch
| Spec | As2 | Bittle X |
|---|---|---|
| Released | 2026-02 | 2023 |
| Status | Production | Production |
| Payload | 15 kg | 0.45 kg |
| Weight | 18 kg | 0.29 kg |
| Degrees of freedom | 12 | 9 |
| Runtime | 240 min | 60 min |
| Top speed | 5 m/s | 0.4 m/s |
| Price | $3.1k | $299 |
| Robo2u Score | 77 | 47 |
Highlighted = better on that spec (lower is better for price and weight; newer for release). The Robo2u Score is a transparent composite — see the Quadruped Robots for the full field.
