Incredible update on Alijah Arenas -- the high school basketball star and USC commit is out of his coma and making strides in his recovery just 24 hours after his terrifying Cybertruck crash.
An Arenas family rep shared the positive news just minutes ago ... saying the 18-year-old's development has been "remarkable and hopeful."

The statement said Arenas remains intubated ... but at one point, was able to open his eyes and write on a piece of paper to ask if anyone was hurt as a result of the accident.