Jev introduces a new shape of LLM—System One, aka Decision Models

Last week TypeSafe AI unveiled Jev, their first example of a new category of model that they are calling “System One models” (I’m with Maggie Appleton, I think “decision models” …

Supersonic Labs on Twitter / X

Introducing Julia-1:Our first classification model that runs on almost anything.Learn more 👇https://t.co/YJCdEeIBSo pic.twitter.com/3cizsbG9ZB— Supersonic Labs (@supersonicai) September 26, 2026

Introducing Julia 1 | Supersonic Labs

Julia 1 is our compact decision model. Explore the research, evaluation results, limitations, and model repository.

jev-posts-taxonomy.yaml

jev-posts-taxonomy.yaml · GitHub

Introducing System One Models and Jev - TypeSafe AI Blog

TypeSafe AI is an AI lab building machine-native intelligence infrastructure for automation, designed to make decisions within software. Try our first System One Model, Jev, in early access.

jaredpalmer/kev

tiny Jev-like family of decision models built on top of Qwen3.5 you can train and run on your own

Thomas Yu on Twitter / X

Yesterday @supersonicai released an open weight jev-like model called julia-1This demo shows julia-1 running locally on my M5 Macbook Pro doing ~1500 tokens/sec calculating a live call's scam risk and risk types.Even for this moderately complex task, julia-1 was able to do… pic.twitter.com/VYHRvrjyIS— Thomas Yu (@thommyyu) September 27, 2026

Jev Decision Index - a Hugging Face Space by multimodalart

Benchmarks and news on various repros of TypeSafe's Jev

Supersonic Labs on Twitter / X

You were saying something...?yes, we classify responses 5x faster than Jev, using our own 144M-param model (Julia-1) on a 2021 i5 laptop while maintaining high accuracy. So no, we’re not like other open-source models. And fuck no, we’re not just a game neural network. https://t.co/xoz1HbRV2W pic.twitter.com/oiKZqVtqIC— Supersonic Labs (@supersonicai) September 24, 2026

SupersonicLabs/Julia-1-ONNX · Hugging Face

We’re on a journey to advance and democratize artificial intelligence through open source and open science.

Zed now predicts your next edit with Zeta, our new open model

From the Zed Blog: A tool that predicts your next move. Powered by Zeta, our new open-source, open-data language model.

SupersonicLabs/Julia-1 · Hugging Face

We’re on a journey to advance and democratize artificial intelligence through open source and open science.

Jev’s Architecture Unmasked — archerhume

I probed Jev with 10,000 API calls to work out roughly how it’s built, and why most of the grifter takes on X are completely wrong.