Jev as a real-time robot policy in MuJoCo

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.

@dimentary·X·Sep 18, 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

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

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

An SO-101 arm with Jev choosing the next move about twice a second. After a slip, it went back for the ball and got it in the bowl.