AI glossary · Beginner · Robotics & physical AI
Humanoid
A humanoid is a robot with a body structure similar to a person's, such as a head, torso, two arms and two legs. The aim is to use spaces and tools made for people as they are.
About this term
- Level
- Beginner · Core ideas for first-time readers
- Category
- Basics
- Fields
- Robotics & physical AI
- Added
- 2026-10-08
How it works
A humanoid is made up of 'sensory organs' such as cameras and joint sensors, a 'body' of motors and joints, and 'brain' software that controls them. Walking while balancing on two legs is very difficult, so control technology that constantly adjusts posture to avoid falling is needed. Recently, instead of programming rules set by people one by one, training movements with reinforcement learning or demonstration data has become more common. There are also active efforts to attach AI models that understand language and video together (VLA) as the brain, turning instructions like 'Pick up the cup' into actions.
Why it matters
Factories, warehouses and homes are all designed around the human body. There is an expectation that a robot shaped like a person could work in them without major changes to the facilities. Another advantage is that video and demonstration data of people working are easy to use for training. So, together with advances in large AI models, humanoids are drawing attention as 'a path for AI to step out of the screen into the physical world.'
Things to know
A human shape is not the best for every job. For many tasks, wheeled robots or fixed robot arms are cheaper and more stable. Handling objects delicately with fingers and coping with unfamiliar situations are still major challenges. Demo videos sometimes show robots being remotely controlled by people, so it is worth checking whether the robot acted on its own. Safety, price and battery life are also factors holding back real-world adoption.
Example
Humanoid development has become a field that both robotics companies and AI companies are entering. This site also covered a report that Boston Dynamics hired Rohit Prasad, who led Alexa and the AGI organization at Amazon, as its new CEO. A robotics company putting an AI expert at its head shows that the competition in humanoids is shifting from the 'body' to the 'brain.'