Ex-OpenAI researcher's TypeSafe launches System One model Jev: 100x faster structured decisions
aigclink · x · 2026-09-16
TypeSafe AI, founded by ex-OpenAI researcher Diogo Almeida (who worked on the instruction-following research behind ChatGPT), is launching its first "System One Model" after two years in stealth: a new class of models built for fast, structured decisions that software can call directly.
- Jev, available today in early access, matches existing LLMs on System One tasks while being two orders of magnitude faster and more efficient.
- Jev gives up free-form string generation entirely, focusing on typed probabilistic outputs with a claimed inability to hallucinate — "a frontier-intelligence function call".
- The stack includes a new architecture, an efficiency-focused parallel sampler, and a training method called RLCD (Reinforcement Learning for Calibrated Decisions), contrasted with RLHF/RLVR.
- Almeida's thesis: chat models have been superhuman for years, but automation hasn't arrived because models are optimized for human preference rather than machine decision-making.
Related event: TypeSafe exits stealth with decision model Jev and RLCD training method(86 posts)→
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