Reverse-engineered Jev-like model released

An open-source repo releases a Jev-like model that scores multiple text options in one pass, with Doom and chess examples. Reported results: Doom checkpoint averaged 0.60 kills and -97.50 reward over 10 episodes; chess checkpoint scored 4 wins, 46 draws, 0 losses vs a random mover but 0 wins, 2 draws, 48 losses vs Stockfish level 0.

• TypeSafe launches Jev, a faster cheaper frontier model2026-09-15