Jev introduces a new shape of LLM - System One, aka Decision Models

TypeSafe AI released Jev last week, calling it the first example of a new System One model category, though the author prefers decision model. It takes text and returns floating-point values and confidence for categories, yes/no questions and scores. Only input is billed, at $0.042 per million tokens for the first model. The author sees uses in spam detection, tagging and ranking, has tried search reranking, and notes weaknesses with numbers, dates and adversarial content.