Tesla CEO Elon Musk showcased his much-touted humanoid robot ‘Optimus’ at the electric vehicle maker’s “AI Day” event on Friday.

A prototype of the robot walked on stage slowly and waved to a cheering crowd.

A prototype of the robot walked on stage slowly and waved to a cheering crowd.

Musk said that Friday night was the first time the early robot walked onstage without a tether.

Musk said that Friday night was the first time the early robot walked onstage without a tether.

Tesla CEO Elon Musk anticipated humanoid robot ‘Optimus’ would cost under $20,000 and cautioned it is not ready just yet.

Tesla CEO Elon Musk anticipated humanoid robot ‘Optimus’ would cost under $20,000 and cautioned it is not ready just yet.

The billionaire has said a robot business will be worth more than its cars, hoping to expand beyond self-driving cars that have not yet become a reality despite his repeated promises.

“Our goal is to make a useful humanoid robot as quickly as possible,” Musk said at the event.