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I built a Jev-style decision model for Japanese in two days. Claude Code A/B-tested my architecture and killed it.

TL;DR TypeSafe's Jev introduced "System One" models: no text generation, you send a state and typed questions, you get typed answers with calibrated probabilities in one forward pass. Open reproductions followed within weeks. The most complete one is Laya (ModernBERT-large, 421M). I benchmarked lay…

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  1. 2026-09-22 06:35 · DEV Community — Machine Learning
    I built a Jev-style decision model for Japanese in two days. Claude Code A/B-tested my architecture and killed it.

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