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Decision models, in depth.

Articles on System One decision models — how they differ from LLMs, the Laya and Jev architectures, calibration, and publishing to the registry.

Tev1, explained — Together AI's $17 recipe for a Jev-style classifier

Tev1-4B-experimental is a LoRA fine-tune of Qwen3.5-4B that reads a state and up to 24 options and answers with one letter. Together published the model, the recipe and the tutorial; the weights licence is still being decided.

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