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

Simon Willison · published 21 September 2026

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6blogs citing
First cited
22 Sept 2026
Most recent
26 Sept 2026
Rank this month
not ranked
Links from this post
25
Words captured
992

Cited by

Blog
In the post
Date
eay.cc – Weblog von Stefan Grund
changelog.earth – Positive, planetare Release Notes | Stefan Grund Read at the source ↗
26 Sept 2026
petervandijck.com
Jev means permission to play for product and UX builders Read at the source ↗
25 Sept 2026
labs.davlgd.com
shouldi: exploring Jev AI by example Read at the source ↗
23 Sept 2026
dSebastien
Decision Models (DMs) Read at the source ↗
23 Sept 2026
dSebastien
System One Models Read at the source ↗
23 Sept 2026
dSebastien
Jev and System One models - a semantic if statement for your code Read at the source ↗
23 Sept 2026
alexmolas
Jev can’t be calibrated Read at the source ↗
23 Sept 2026
blog.serendeep.tech
RL by Subtraction: Everything We Stopped Needing Read at the source ↗
22 Sept 2026

Links from this post

Link
Host
https://typesafe.ai/
typesafe.ai
Typesafe AI: System One Models and Jev Read at the source ↗
typesafe.ai
https://twitter.com/Mappletons/status/2101560333441610133
twitter.com
https://www.llm-prices.com
llm-prices.com
https://developers.openai.com/api/docs/models/gpt-5-nano
developers.openai.com
https://news.ycombinator.com/item?id=49717558
news.ycombinator.com
https://en.wikipedia.org/wiki/Bernoulli_distribution
en.wikipedia.org
https://docs.typesafe.ai/model-jaggedness/jev-1.13
docs.typesafe.ai
https://en.wikipedia.org/wiki/Cupertino,_California
en.wikipedia.org
https://en.wikipedia.org/wiki/East_Palo_Alto,_California
en.wikipedia.org
https://github.com/kyle-pena-nlp/jevchat/
github.com
https://news.ycombinator.com/item?id=49778162
news.ycombinator.com
https://github.com/f/jev-leftpad
github.com
https://www.npmjs.com/package/left-pad
npmjs.com
https://github.com/f/jev-leftpad/blob/4f405354de756cc372826d19aa8dfbee2b675778/src/index.js
github.com
kicking the tires on jev (TypeSafe's System One model) with 2048 Read at the source ↗
gist.github.com
https://simple-jev.featherless.ai/cool-demo/2048/
simple-jev.featherless.ai
https://github.com/jaredpalmer/kev
github.com
Kev: Tiny Jev-like family of decision models built on top of Qwen3.5 Read at the source ↗
news.ycombinator.com
https://benchmarkheaven.com/jev-models
benchmarkheaven.com
https://github.com/simonw/llm-typesafe
github.com
https://llm.datasette.io/
llm.datasette.io
https://github.com/simonw/llm-typesafe/blob/main/README.md
github.com
https://simonwillison.net/atom/everything/
simonwillison.net
https://simonwillison.net/about/
simonwillison.net