humanoidrobots.systems

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Pick two to four robots. Every pair also has its own permanent page, 1,326 in total, generated from the same records.

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HopeJR vs ROBOTIS OP3

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HopeJR has 46 more degrees of freedom (66 vs 20) than ROBOTIS OP3. Openness score: HopeJR 90, ROBOTIS OP3 45 (of 100); only HopeJR publishes CAD and BOM. Availability: HopeJR diy build, ROBOTIS OP3 buy.

Side-by-side specifications. Rows marked with a square differ.
FieldThe Robot Studio & Hugging FaceThe HopeJRROBOTISROBOTIS OP3Δ first − second
Identity
Maker (differs)The Robot Studio & Hugging FaceROBOTIS
ClassHumanoidHumanoid
StatusActiveActive
Availability (differs)DIY buildBuy
Country (differs)FranceSouth Korea
Year2025—unsourced
Specifications
Height—unsourced51cm
Mass—unsourced3.5kg
Degrees of freedom (differs)6620+46 (+230%)
Payload—unsourced—unsourced
Top speed—unsourced—unsourced
Runtime—unsourced—unsourced
Battery capacity—unsourced36.6Wh
Price3,000USD—unsourced
Actuators (differs)Robstride 02 (humanoid body update)20x Dynamixel XM430-W350-R
Compute—unsourcedIntel NUC i3, 8GB RAM
Sensors—unsourcedLogitech C920 camera, 9-axis IMU
Openness and provenance
Openness bar9045
Openness score (differs)90/ 10045/ 100+45
CAD (25) (differs)publicnot public
Bill of materials (20) (differs)publicnot public
Sim model (URDF/MJCF) (20)publicpublic
Firmware (15)publicpublic
Software (10)publicpublic
Trained policies (10)not publicnot public
Verification level (differs)L1L2
Sources (differs)42
Last checked (differs)2026-09-252026-09-24
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