Jev vs Laya: Comparing and Choosing Between Closed-Source and Open-Source System One Decision Models
Introduction In September 2026, a new kind of model that “doesn’t talk” suddenly became the talk of the AI world. On September 15, TypeSafe AI, founded by former OpenAI researcher Diogo Almeida, released Jev. It doesn’t chat, write articles, or generate code. It takes a piece of state and a set of predefined questions, and directly returns structured decisions with calibrated probabilities. Just three days later, on September 18, independent researcher Nandakishor M (Convai Innovations) open-sourced Laya....