Question 1

What is Jev?

Accepted Answer

Jev is a judgment-only AI model from TypeSafe AI. It does not write text — it makes fast, low-cost micro-decisions: yes/no answers, multiple-choice selections, and numeric scores on structured input. Early access opened September 15, 2026.

Question 2

Is Jev free?

Accepted Answer

No — but it is very cheap. Community documentation reports pricing of $0.042 per million input tokens with output free (verdicts are tiny). There may be early-access allowances; check console.typesafe.ai for current terms. See our Models & Pricing guide for limits and honest accuracy caveats.

Question 3

Who founded Jev?

Accepted Answer

TypeSafe AI was founded by Diogo Almeida, an early core technical contributor to ChatGPT. His one-line framing of Jev: "Think of Jev as a frontier-intelligence function call: unstructured state in, typed probabilistic decisions out." The name nods to the Jevons paradox — cheaper judgment means more judging, not less.

Question 4

What are the three primitives?

Accepted Answer

Every Jev question is one of three types: Noul (yes/no, returns a probability), Choice (pick one of up to 255 options, returns probabilities plus a confidence value), and Score (rate on a 2–10 level scale, returns legend, probabilities, and confidence). You can mix all three in a single API call. Full comparison: The Three Primitives guide.

Question 5

How does Jev relate to GPT or Claude?

Accepted Answer

It complements them. Jev handles cheap front-line classification and scoring at volume; generative models like GPT handle only the items that pass the filter. Early-access demos claim this split can make pipelines dramatically cheaper — see our Jev vs LLM guide.

Question 6

Who made this site?

Accepted Answer

jevai.guide is an unofficial fan-made handbook, built by independent authors tracking Jev's early-access launch. We are not affiliated with, endorsed by, or sponsored by TypeSafe AI or jev.com. Jev is a trademark of its respective owner.

Question 7

Where is the official site?

Accepted Answer

jev.com. Everything official — access requests, API keys, documentation, pricing — lives there. If anything on this site disagrees with jev.com, jev.com wins; please tell us via /contact so we can fix it.

Jev FAQ