Synthesia's hyperrealistic deepfakes will soon have full bodies

No one else is able to do that," says Jack Saunders, a researcher at the University of Bath, who was not involved in Synthesia's work. The full-body avatars he previewed are very good, he says, despite small errors such as hands "slicing" into each other at times. But "chances are you're not really going to be looking that close to notice it," Saunders says. Synthesia launched its first version of hyperrealistic AI avatars, also known as deepfakes, in April. These avatars use large language models to match expressions and tone of voice to the sentiment of spoken text.