Rob Hallam
@robj3d3 · Sep 17
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.
Entries
Matthew Berman
@TheMattBerman · Sep 19
Matthew Berman ran 30 simulated buyer personas over 723 ads as 21,690 scroll-or-stop decisions with Jev for 22 cents, as a cheap replacement for a focus group; it will ship in StealAds.
Marcel Pociot 🧪
@marcelpociot · Sep 18
Marcel Pociot built a Mac app that watches Downloads and asks Jev yes/no questions such as 'is this an invoice' to move each file where your rules say.
CJ (Coding Garden)
@CodingGarden · Sep 17
A chat bot with no LLM: an agents & browsers build posted by CJ (Coding Garden) (@CodingGarden) that puts Jev, TypeSafe AI's System One decision model, to work, with a demo video on the post.
Kevin Wang
@mxfp4 · Sep 18
Lurk: a content & growth build posted by Kevin Wang (@mxfp4) that puts Jev, TypeSafe AI's System One decision model, to work, with a demo video on the post.
Chris Nicholas
@ctnicholasdev · Sep 21
Jev workflow builder: a tools & apps build posted by Chris Nicholas (@ctnicholasdev) 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.