Made by TypeSafe AI. Launched Sept. 15, 2026.
The original decision model. Takes a state and a set of possible answers and returns a probability score for each option in parallel — no text generation. Reported 20–200x faster and 40–1000x cheaper than frontier LLMs on decision-shaped work.
Jev is a decision model, not a text generator: it takes a state and a list of multiple-choice questions and returns a probability for each answer, rather than producing free-form output. Here are four practical coding use cases.
Jev is TypeSafe's structured decision model. It returns bounded judgments that application code can use when generated prose is unnecessary — classifying intents, rating AI responses, or deciding document relevance.
A claim-by-claim audit of TypeSafe AI's 200x faster, 400x cheaper decision model, with real pricing math and Hacker News skeptic pushback.