@uttkarsh_42 gave Jev full control of a Falcon-9-class rocket in MuJoCo, with no autopilot or scripted trajectory. After 12 runs it landed the booster using 245 calls and $0.04. Controls included launch or hold, engine count, when to burn, cutoff, coast, entry, legs, and touchdown. They say decisions run at about 1Hz and return in about 0.4s while the vehicle goes unstable every 0.8s.

Utkarsh Agrawal (@uttkarsh_42) published this on 2026-09-17. @uttkarsh_42 gave Jev full control of a Falcon-9-class rocket in MuJoCo, with no autopilot or scripted trajectory. After 12 runs it landed the booster using 245 calls and $0.04. Controls included launch or hold, engine count, when to burn, cutoff, coast, entry, legs, and touchdown. They say decisions run at about 1Hz and return in about 0.4s while the vehicle goes unstable every 0.8s. How Jev or TypeSafe is used, in the post's own words: “so I gave jev full control of the falcon-9 class rocket full launch to landing no autopilot, no scripted trajectories, no safety veto in the code every decision was made by jev ( you can see decisions at the bottom of the video) and yeah it was able to land the booster and all this with just 245 calls and and $0.04 in…” The post does not name a separate audience. It is for people reading what @uttkarsh_42 shows here (it includes media).