A year ago he presented a dancer dressed as a robot on stage.
But at the latest 'Tesla's AI Day' in Palo Alto, California, Elon Musk unveiled a prototype humanoid robot capable of acting without a cable.
Optimus, as his car manufacturer called him, slowly gestured and greeted the audience for about a minute.
"But it can really do much more than what we just showed you," explained the Tesla boss, while a video showed images of the robot carrying boxes and bathing plants with a watering can.
The visionary entrepreneur has assured that when there is mass production "probably" it will cost under $ 20,000, or "less than a car".
Customers should be able to receive it, once ordered, within 3-5 years, but for now it is not yet for sale.
According to Musk, the robot could be useful in the automotive industry and other sectors to make up for the shortage of manpower.
However, Tesla is not the first car manufacturer to develop humanoid robots.
Together with Hyundai-Boston Dynamics, Honda has been working on robots called "Asimo" for nearly 20 years.
In its final form 'Asimo' is a child-sized robot capable - without a cable - of walking, dancing, running, climbing and descending stairs and manipulating objects with its fingers.