bias

Jev introduces a new shape of LLM - System One, aka Decision Modelssimonwillison.net

Jev is a new “System One” decision model that consumes text and returns numeric probabilities (yes/no, choice, score) instead of generated text, priced at $0.042 / M input tokens with free output. It’s fast, cheap, and suited for classification‑type tasks, but its opaque numeric output raises bias and explainability concerns.