Full Self-Driving, rebuilt in under an hour

A self-driving simulation where Jev makes the driving decisions.

@jpschroeder·X·Sep 16, 2026

Jev vs Claude on the same robot

Same robot, same instructions: Jev answers in 233 ms, Claude in 2 s. It also sulks when you insult it.

@Godefroy·X·09.25

Each step is split in two calls: what to do next, then how to move the arm and gripper. Jev gets simplified geometry as text.

A city simulation where Jev controls the lights. Switch it off and the average wait goes up by more than 600%.

@leojrr·X·09.19

"Pick up the cans", then "the bottles": Jev picks the target and the MOSS robot collects it. Real decisions, replayed in simulation.