Fourier GR-2 vs ROBOTIS OP3
Generated from the registry · revision 2026-09-26 · openness out of 100
Fourier GR-2 is 124 cm taller (175 vs 51 cm) and 59.5 kg heavier (63 vs 3.5 kg) than ROBOTIS OP3. Fourier GR-2 has 33 more degrees of freedom (53 vs 20) than ROBOTIS OP3. Openness score: Fourier GR-2 30, ROBOTIS OP3 45 (of 100); only ROBOTIS OP3 publishes FW. Availability for both: buy.
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Side by side
■ rows differ| Field | Fourier (Fourier Intelligence)Fourier GR-2 | ROBOTISROBOTIS OP3 | Δ first − second |
|---|---|---|---|
| Identity | |||
| Maker (differs) | Fourier (Fourier Intelligence) | ROBOTIS | |
| Class | Humanoid | Humanoid | |
| Status | Active | Active | |
| Availability | Buy | Buy | |
| Country (differs) | China | South Korea | |
| Year | 2024 | —unsourced | |
| Specifications | |||
| Height (differs) | 175cm | 51cm | +124 cm (+243%) |
| Mass (differs) | 63kg | 3.5kg | +59.5 kg (+1700%) |
| Degrees of freedom (differs) | 53 | 20 | +33 (+165%) |
| Payload | 3kg | —unsourced | |
| Top speed | —unsourced | —unsourced | |
| Runtime | 120min | —unsourced | |
| Battery capacity | —unsourced | 36.6Wh | |
| Price | —unsourced | —unsourced | |
| Actuators (differs) | Fourier FSA 2.0 actuators (>380 N·m peak) | 20x Dynamixel XM430-W350-R | |
| Compute | —unsourced | Intel NUC i3, 8GB RAM | |
| Sensors | —unsourced | Logitech C920 camera, 9-axis IMU | |
| Openness and provenance | |||
| Openness bar | |||
| Openness score (differs) | 30/ 100 | 45/ 100 | −15 |
| CAD (25) | not public | not public | |
| Bill of materials (20) | not public | not public | |
| Sim model (URDF/MJCF) (20) | public | public | |
| Firmware (15) (differs) | not public | public | |
| Software (10) | public | public | |
| Trained policies (10) | not public | not public | |
| Verification level (differs) | L1 | L2 | |
| Sources | 2 | 2 | |
| Last checked | 2026-09-24 | 2026-09-24 | |
A dash is an unsourced figure, not zero. Sources for each robot are listed on its spec sheet: Fourier GR-2, ROBOTIS OP3.
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