Project87
Projects
Things people built, from weekend demos to products already running.
Examples built on System One models
323 public things people have built, written or argued about since Jev shipped: code, tools, official cookbooks, videos, articles, threads, lists, and the open-source alternatives that cover the same ground. If something is missing, use the submission form.
Browse by kind
- Tool110
Tools
SDKs, wrappers, MCP servers and integrations that call the API for you.
- Cookbook25
Cookbooks
Official worked examples and patterns, straight from the vendor docs.
- Video14
Videos
Walkthroughs, launch coverage and explainers, in several languages.
- Article35
Articles
Write-ups, reviews and analysis, mostly from outside the vendor.
- Discussion23
Discussions
Threads and posts where people argue about what this actually is.
- List7
Lists
Awesome lists and roundups that collect everything else.
- Alternative22
Alternatives
Open-source models and libraries that cover similar ground.
Featured
The entries worth opening first: official material, the tools people actually install, and the demos that show the model doing something.
- Project
Jev Ultrafast (Browser Use)
Browser Use's fast browser agent where Jev picks the operation and the DOM element in a single request; a small LLM is only invoked to write text when typing is required. Demoed on a Google Flights search.
- Project
openjev
Attempt to run a Jev-style System One decision model locally on a single RTX 3090. Companion site at openjev.com.
- Project
jevlike
Open reimplementation that trains a small model to choose among a changing list of text options, emitting one probability per option in a single forward pass. Ships Doom, chess and Wikispeedia demos.
Choice - Project
jev-trader
Makes one AI trade decision every Monad block on the Kuru MON-USDC market using Jev. Live at jev-trader.vercel.app.
- List
Anil-matcha/awesome-jev-by-typesafe
Independent community collection of use cases, patterns, prompts and starter code for Jev, explicitly not official. The 2023 creation date means the repo was renamed from an older project, so its 412 stars are not Jev-era traction.
ChoiceScoreNoul - Tool
typesafe-ai/skills (official TypeSafe agent skill)
Official agent skill for Claude Code, Codex and other agent environments; installs via claude plugin marketplace add typesafe-ai/skills or npx skills add typesafe-ai/skills. MIT licensed.
- Tool
jkudish/jev-mcp
Proof-of-concept MCP server for Jev that lets Claude Code, Claude Desktop and Codex call the model and receive probabilities they can branch on. The most-starred Jev MCP server found.
- Video
JEV Breakdown: The First AI Model Built For Code
Walks through the Choice, Score and Noul primitives live in the TypeSafe playground, with speed and cost numbers and their caveats. The most-watched Jev video found.
ChoiceScoreNoul - Video
wtf is jev?
CJ from Syntax explains what Jev is, how it works, and walks through several use cases and demos. 17 minutes.
ChoiceScoreNoul - Article
[AINews] Jev: a System One Model that only decides/classifies/routes/scores
AI News daily roundup leading with the Jev launch, summarising RLCD and TypeSafe's 20-200x speed and 40-400x cost claims. Frames Jev as part of a broader move toward task-specialised models.
- Article
Jev means structured output is interesting again
Argues Jev's speed comes mainly from constrained single-token generation and aggressive prefill, techniques reproducible with existing LLMs, rather than a new architecture. Still treats very fast structured output as a new primitive, while doubting Jev matches frontier models on raw intelligence.
- Project
Ran Jev against an existing classifier eval that previously used Gemini 2.5 Flash Lite
Vercel CTO reports Jev saturated an existing classifier eval that had used Gemini 2.5 Flash Lite and ran about 6x faster. Original post; TypeSafe's quote-tweet is a separate item.
Browse by use case
All use casesThe same entries, sorted by the job they do.
Workflow control
Retrieval and knowledge
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Data and operations
Real-time and agents
Latest
The twelve most recent additions.
- Jev Tac ToeJosh Pigford (@Shpigford)Project
- JevsweeperJosh Pigford (@Shpigford)Project
- kyotofin/tax-doc-classifierNakshatra Saxena (@nedwize)Project
- 24601/Augustus24601Tool
- A deep dive into Jev, TypeSafe's System One modelFlavio CopesArticle
- abhixhek/jevcalabhixhekTool
- ably-labs/jev-pongably-labsProject
- agent-labs-dev/fastbrowseagent-labs-devProject
- ainame/swift-typesafeainameTool
- AkashPriyadarshii/jev-curateAkashPriyadarshiiTool
- An early-access test of TypeSafe's Jev: calibrated judgments for half a centEmil LindforsArticle
- andrelandgraf/typesafe-on-neonandrelandgrafTool
Built something with Jev?
Send the link. Entries are checked by hand and added most days.