RankedUnitree A2 vs Unitree B2
Key facts
Unitree A2 (Unitree Robotics; Shipping) and Unitree B2 (Unitree Robotics; Shipping) are both quadruped robot (robot dog)s. Published figures: weight 42 kg (93 lb) vs 60 kg (132 lb); speed 3.7 m/s (13.3 km/h · 8.3 mph) vs 6 m/s (21.6 km/h · 13.4 mph); payload 25 kg (55 lb) vs 40 kg (88 lb); runtime 3 h–5 h vs 4 h–6 h. Published for only one of them: degrees of freedom (Unitree A2: 12). Price: Unitree A2 US$100,000, Official store (global) (official price); Unitree B2 US$100,000, Official store (global) (official price). Robot 500: Unitree A2 #9 (score 69.7), Unitree B2 #3 (score 73.3). Disclosure: Unitree A2 has 22 sourced values (81% of tracked fields), Unitree B2 has 21 (81%).
Cite: RankedRobot, https://rankedrobot.com/compare/unitree-a2-vs-unitree-b2/ (checked 2026-09-25) · Every figure below links to its source · Unitree A2 spec sheet · Unitree B2 spec sheet
| Spec | Unitree A2 | Unitree B2 |
|---|---|---|
| Status | Shipping | Shipping |
| Price | US$100,000, Official store (global) (official price) source | US$100,000, Official store (global) (official price) source |
| Robot 500 | #9 · 69.7 | #3 · 73.3 |
| Launch | ||
| Announced | ||
| Status | ||
| Body | ||
| Dimensions | ||
| Weight | ||
| Form factor | ||
| IP rating | ||
| Mobility | ||
| Max speed | 3.7 m/s (13.3 km/h · 8.3 mph)ManufacturerSource: unitree.com (2026-09-25)Conditions: sustained speed as stated; page separately lists an up-to ~5 m/s figure | 6 m/s (21.6 km/h · 13.4 mph)ManufacturerSource: unitree.com (2026-09-25)Conditions: sustained speed as stated |
| Stairs | Stairs of 20-25cm; obstacle crossing up to 40cm; climb angle >45 degManufacturerSource: unitree.com (2026-09-25) | |
| Joints & payload | ||
| Degrees of freedom | ||
| Payload | ||
| Peak load | ||
| Compute & AI | ||
| Processor | Intel Core i5/i7 or NVIDIA Jetson Orin NX (configurable)ManufacturerSource: unitree.com (2026-09-25) | |
| AI performance | ||
| Teleoperation | ||
| Sensors | ||
| Cameras | ||
| LiDAR | ||
| Microphones | Not tracked | |
| Power | ||
| Battery | ||
| Runtime | 3 h–5 hManufacturerSource: unitree.com (2026-09-25)Conditions: unloaded continuous walking; loaded (25kg) figure is >3h/~12.5km | |
| Hot-swappable battery | ||
| Software | ||
| SDK | Unitree SDK2 (unitree_sdk2, C++/Python) with ROS2 support (unitree_ros2)ManufacturerSource: support.unitree.com (2026-09-25) | Unitree SDK2 (unitree_sdk2, C++/Python) with ROS2 support (unitree_ros2)ManufacturerSource: support.unitree.com (2026-09-25) |
| Commercial | ||
| Regions sold | ||
Confidence labels: Manufacturer = stated by the maker · Verified = independently confirmed · Reported = credible media or retailer, not confirmed by the maker · ⚠ Unconfirmed = leak or single source · Not disclosed = not published. We never estimate missing figures. Add more robots to this comparison.
Quick answers
What is the difference between the Unitree A2 and the Unitree B2?
Published figures: weight 42 kg (93 lb) vs 60 kg (132 lb); speed 3.7 m/s (13.3 km/h · 8.3 mph) vs 6 m/s (21.6 km/h · 13.4 mph); payload 25 kg (55 lb) vs 40 kg (88 lb); runtime 3 h–5 h vs 4 h–6 h. Published for only one of them: degrees of freedom (Unitree A2: 12).
Which is cheaper, the Unitree A2 or the Unitree B2?
Price: Unitree A2 US$100,000, Official store (global) (official price); Unitree B2 US$100,000, Official store (global) (official price). Prices are shown exactly as published, never converted or estimated.
Which ranks higher in the Robot 500, the Unitree A2 or the Unitree B2?
Robot 500: Unitree A2 #9 (score 69.7), Unitree B2 #3 (score 73.3). Method: https://rankedrobot.com/robot500/#method
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