Decision models

A decision model reads a state — a log, a diff, a ticket, a web page — and a set of typed questions: pick one of these options, yes or no, or where on this scale. One forward pass returns a probability for every option. Nothing is generated, so there's no text to parse and no answer outside the options you gave it.

They sit inside agent loops where a chat model would be slow and expensive: routing, triage, "did the tests pass", "which button next", "is this safe to run". Most are small open-weight fine-tunes you can host yourself; the original is TypeSafe AI's hosted Jev.