Updated Oct 3, 2026

What people are building with Jev

Projects, posts and guides about Jev, the System One model from TypeSafe AI. Each entry links to its source and shows the cost and speed its author reported.

Browse the builds What is Jev?

756builds
164guides
21use cases

GitHubTrading and markets
jev-as-quant
Typed System One decisions as the judgment layer of a quant stack.
jiayylu
3
GitHubOpen source
open-jev-laya
Browser-only Laya demos powered by Transformers.js.
killkli
11
GitHubOpen source
laya-apple
A correctness-validated Laya runtime for Apple Silicon.
tc3oliver
12
GitHubContext and memory
cairn-jev-lab
Test what your AI should remember, with Jev deciding admission.
Cairn-ink
4
GitHubOpen source
jevelry
Open code for Jev, shown on Hacker News.
phegler
7
GitHubAgents and browsers
Sniffslop
A browser extension that classifies text with Jev.
a_c
1
GitHubCoding and code review
Jevopt
Compiler optimisation decisions made with Jev.
ramneet_singh
4
GitHubSearch
Jev-powered Obsidian search
Search an Obsidian vault with Jev deciding relevance.
MikeLembo
10
GitHubOpen source
Beating Jev with open models
An attempt to beat Jev’s accuracy, speed and cost with open models.
rob313
8
GitHubOpen source
laya-coreml
A faster, local Laya-like model for the Mac.
mkagenius
1.5k
Sponsoredoutrank.so
Outrank
Outrank - Grow Organic Traffic on Auto-Pilot.
GitHubSEO and GEO
Pick
jev-seo
A live SEO audit for any site, with Jev judging every page.
AgriciDaniel
156
Omid Sayfun
@OmiidSayfun
Couldn't find my important unread emails, so I built a Chrome extension. Jev finds them and labels them by what they're about. You can check it out here: github.com/iamomiid/jev-i…
GitHubInbox and support
jev-inbox
Daniel Raeder
@DanRaeder
While Jev is down for new invites, I worked with Claude last night to build Vej (a jev clone that runs locally.) It's weakest at score types, but almost 1:1 for noul and choice. You can use it to build and play with jev-based apps until you can get in. github.com/draeder/Vej
GitHubOpen source
Vej
Muskan Paliwal
@PaliwalMuskan19
built this skill-picker for myself because apparently having 30+ agent skills also means remembering which one does what 😭 jev (@typesafeai), being the god that it is, ranks them for a given task and tells me and my agents which skills are actually worth using phew. one less thing for my brain to cache. https://github.com/MuskanPaliwal/skill-picker
GitHubRouting and model choice
skill-picker

Jev GitHub repos

Code you can read, fork and run: jev-ultrafast, OpenJev, nanojev, jevlike, simplejev, jev-trader, jev-mcp and the rest. Each repo calls Jev for a decision — which link to follow, which bucket a ticket goes in, which move to make — and the figures on a card are the ones its author published.

318 builds and 12 guides