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TypeSafe AI· Released Sep 15

Jev

Jev is TypeSafe AI's first public System One decision model: it answers closed questions (labels, yes/no, scores, choices) with structured output in milliseconds for a fraction of a cent, rather than generating prose.

Smart copy and paste that decides what to pasteSep 20

Entries

Diogo Almeida

@CompleteSkeptic · Sep 15

Jev plays Doom: a games & real time build posted by Diogo Almeida (@CompleteSkeptic) that puts Jev, TypeSafe AI's System One decision model, to work, with a demo video on the post.

Riley Brown

@rileybrown · Sep 17

500 emails for 3.5 cents: a triage & routing build posted by Riley Brown (@rileybrown) that puts Jev, TypeSafe AI's System One decision model, to work, with a demo video on the post.

Mau Baron

@maubaron · Sep 18

Maubaron had Jev control all four fighters in a Smash Bros. match, choosing each move in a fraction of a second at a cost of a couple of cents.

nader dabit

@dabit3 · Sep 18

Nader Dabit shared his first Jev experiment, a launcher that predicts your intent from each keystroke, as a sign of how many new apps become possible with sub-second decisions.

Duncan

@ephraimduncan · Sep 17

A model router on Jev: a triage & routing build posted by Duncan (@ephraimduncan) that puts Jev, TypeSafe AI's System One decision model, to work, with a demo video on the post.

Sarvagya Kulshreshtha

@sarvagya_kul · Sep 18

The team gave Jev a candidate profile and 400 companies and had it rank where the candidate is most likely to land, with a confidence score for each, for a fraction of a cent.

Abol

@abolbuild · Sep 17

$10,000 in Jev’s hands: a trading & markets build posted by Abol (@abolbuild) that puts Jev, TypeSafe AI's System One decision model, to work, with a demo video on the post.

Jev: quick answers

What can you build with Jev?
People have published 180 public builds made with Jev. The most common uses are productivity (35), coding (29), games (24), agents (23) and content (21).
What are the best Jev GitHub repos?
The most-starred open-source Jev projects in the index are laya: Non-autoregressive System 1 decision engine. Typed choice, score and y, jev-ultrafast: Fastest and cheapest web agent and kev: Jev-like family of decision models built on top of Qwen3.5/3.8 you can.
Where do people share Jev projects?
Mostly on X, GitHub and Web, from 164 creators between Sep 15 and Oct 1.