How humanoid robots work, in plain English.
You don't need an engineering degree to be a smart robot buyer — but understanding three building blocks (muscles, senses, brain) explains almost every price difference and capability gap on the market. Here's the five-minute version.
Muscles: actuators
Every joint in a humanoid is an actuator — a motor-gearbox package that converts electricity into precise motion. A full-size humanoid carries dozens, and they dominate the cost of the machine. This is also where design philosophy shows: rigid, powerful actuators give industrial robots their 20–25 kg payloads; softer, compliant actuation gives home robots like NEO their safety around people. When you compare payload specs on our site, you're really comparing actuator budgets.
Senses: cameras and everything else
Humanoids see mostly through cameras, augmented by depth sensors, microphones, joint-position encoders, and force sensors in hands and feet. The industry has largely converged on the "cameras plus AI" approach that Tesla champions — put simply, the same bet as self-driving: rich vision plus a smart brain beats exotic sensors.
Brain: foundation models
The revolution that made 2026's robots possible isn't mechanical — it's AI. Modern humanoids run "vision-language-action" models: the same family of technology behind chatbots, trained instead to translate what the robot sees and hears into motor commands. This is why capabilities improve via software update, why robots learn from watching humans, and why one company's warehouse experience transfers to your kitchen. It's also why remote human "teleoperation" exists — humans handle the edge cases, and the AI trains on those recordings until it doesn't need to.