Tesla has unveiled its long-awaited robotaxi at a Hollywood studio, though fans of the electric vehicle maker will have to wait until at least 2026 before they are available.

CEO Elon Musk pulled up to a stage at the Warner Bros studio lot in one of the company's "Cybercabs", telling the crowd that the sleek, AI-powered vehicles did not have steering wheels or pedals. 

He also expressed confidence in the progress the company had made on autonomous driving technology that makes it possible for vehicles to drive without human intervention.

Tesla began selling the software, which is called "Full Self-Driving", nine years ago, but there are doubts about its reliability.

"We'll move from supervised Full Self-Driving to unsupervised Full Self-Driving. where you can fall asleep and wake up at your destination," he said on Thursday. 

"It's going to be a glorious future."

Tesla expects the Cybercabs to cost under $US30,000 ($A44,000), Musk said. 

He estimated the vehicles would become available in 2026, then added "before 2027".

The company also expects to make the Full Self-Driving technology available on its popular Model 3 and Model Y vehicles in Texas and California in 2025. 

"If they're going to eventually get to robotaxis, they first need to have success with the unsupervised FSD at the current line-up," said Seth Goldstein, equity strategist at Morningstar Research.

"Tonight's event showed that they're ready to take that step forward."

Tesla had 20 or so Cybercabs on hand and offered attendees the opportunity to take rides inside the movie studio lot - not on Los Angeles' roads.

At the presentation - dubbed "We, Robot" and streamed live on Tesla's website and X - Musk also revealed a sleek minibus-looking vehicle that, like the Cybercab, would be self-driving and could carry up to 20 passengers.

The company also trotted out several of its black and white Optimus humanoid robots, which walked a few feet from the attendees before showing off dance moves in a futuristic-looking gazebo. 

Musk estimated the robots would cost between $US28,000-$US30,000 and would be able to babysit, mow lawns, fetch groceries, among other tasks.

"Whatever you can think of, it will do," he said.

The Cybercab's unveiling comes as Musk tries to persuade investors that his company is more about artificial intelligence and robotics as it struggles to sell its core products, an ageing line-up of electric vehicles.

Musk has been saying for more than five years that a fleet of robotaxis is near, allowing Tesla owners to make money by having their cars carry passengers while they are not in use by the owners. 

But he has acknowledged past predictions for the use of autonomous driving proved too optimistic. 

In 2019, he promised the fleet of autonomous vehicles by the end of 2020. 

The announcement comes as US safety regulators are investigating Full Self Driving and Autopilot based on evidence that it has a weak system for making sure human drivers pay attention. 

By Tom Krisher and Alex Veiga in Los Angeles