System One Models: Jev, the Open-Source Alternatives, and Where They Fit
Most LLM calls in a backend are structured decisions dressed up as chat. TypeSafe's Jev answers only that kind of question: typed answers with probabilities, in one pass, with no text generation. What it is, how its confidence numbers work, what 'can't hallucinate' does and does not mean, the open-source alternatives that appeared within weeks, and where an SRE would put one.