The Jev launch post
Diogo Almeida introduces Jev, TypeSafe’s structured decision model. Watch the launch film and explore the original thread for the model’s approach, examples and author-reported performance.
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Recent activityA FIELD GUIDE TO JEV / VOL. 01
The best of Jev. Real projects, practical guides and ideas from across the internet.
Diogo Almeida introduces Jev, TypeSafe’s structured decision model. Watch the launch film and explore the original thread for the model’s approach, examples and author-reported performance.
TypeSafe’s official launch announcement introduces the lab and points builders to Jev. It includes Diogo Almeida’s launch film and original introduction.
TypeSafe highlights Jev’s typed-output approach: applications provide state and questions, then act on probabilities, choices or scores. The linked announcement also covers the Venice API integration.
x.comAnswers your code can useExplore this project ↗TypeSafe announces public access to Jev without a waiting list. The official console is the starting point for trying typed decisions in your own application.
x.comJev opens to everyoneExplore this project ↗Four official signals. A fresh starting point on each visit.
65 resources
AI-assisted summaries and translations. Check original sources for context and performance claims.
Launch post: architecture, RLCD training, pricing, Doom and Wikiracing demos, FAQ.

Jev · News ·
Paste a state, add questions, and see typed answers in the browser.
console.typesafe.aiPlaygroundExplore this project ↗Source-linked curation
Official TypeSafe server. Builder demos live in the Show and Tell channel.
discord.ggDiscordExplore this project ↗Source-linked curation
Published eval methodology and per-model results for System One workflows.
evals.typesafe.aiWorkflow evalsExplore this project ↗Source-linked curation
The case for machine-native intelligence built for software, not conversation.
typesafe.aiManifestoExplore this project ↗Source-linked curation
Jev is utilized for decision-making processes on Cloudflare, including support routing and risk management.

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A tech publication highlights Jev as an AI model offering a cost-effective and efficient approach to software intelligence.

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A guide explaining how to integrate Jev with Pydantic AI agents for type-safe operations.

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Jev selects legal moves in a game of chess, compared to reasoning models.

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A practical guide explaining the use of TypeSafe’s System One model, providing technical insights for developers.

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One sentence becomes six room settings. Jev chooses, the app renders.
jev-room.moe136231.chatgpt.siteJev RoomExplore this project ↗Source-linked curation
The maze as JSON; Jev picks the turn at each junction in real time.
jev-pacman.ephraimduncan.comJev Pac-ManExplore this project ↗Source-linked curation
Head-to-head test at validating local event listings, with cost and latency.
nearhere.eventsJev vs Mistral and Gemini for event validationExplore this project ↗Source-linked curation
A 30-minute internal session on Jev attended by over 50 engineers, generating more than 50 product ideas.

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A resource explaining Jev's functions, costs, and evaluation metrics as TypeSafe's System One model.

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Dev.to walkthrough of the Vercel AI SDK evaluate integration.
dev.toHe says he co-invented ChatGPT. His new AI will not write a wordExplore this project ↗Source-linked curation
A guide on using Jev to route between models and block risky tool calls.

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The Register on the launch, the Doom demo, and the $40M seed round.
www.theregister.comTypeSafe AI debuts model for machines that plays DoomExplore this project ↗Source-linked curation
Local Telegram channel JSON analyzer for intent, quality, sentiment, and speaker tone.
jevclassifier.vercel.appJev ClassifierExplore this project ↗Source-linked curation
Hugging Face Space exploring open-source parallel constrained decoding as an alternative to Jev.
huggingface.coParallel Constrained Decoding (Qwen2.5-1B-RLCD)Explore this project ↗Source-linked curation
1,800-point thread debating whether typed decisions replace LLM calls for classification, routing, and scoring.
news.ycombinator.comHacker News launch threadExplore this project ↗Source-linked curation
X client with Jev smart rules that filter the timeline by usefulness, type, and topic.
dmx.todmx.toExplore this project ↗Source-linked curation
Work-in-progress demo of Jev driving Minecraft, including fleeing zombies at night.
reddit.comJev plays Minecraft (r/accelerate)Explore this project ↗Source-linked curation
Jev is discussed with examples of Choice, Noul, and Score in a Python project.

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Every's Mike Taylor runs his whole archive through Jev.
every.toMini-Vibe Check: Jev judged everything I have written in 0.7 secondsExplore this project ↗Source-linked curation
Company homepage, waitlist, and product overview.
typesafe.aiTypeSafe AIExplore this project ↗Source-linked curation
Village NPCs that judge you each tick, deciding what to do and how they feel, instead of chatting.
hollow-creek-sigma.vercel.appHollow CreekExplore this project ↗Source-linked curation
Anthony Maio's essay on what a model that cannot generate text is for.
anthonymaio.substack.comJev: The Language Model That Will Not TalkExplore this project ↗Source-linked curation
Test a post against 10,000 synthetic personas before you publish it.
crowdcheck-ai.vercel.appCrowdcheckExplore this project ↗Source-linked curation
Jev vs Jev gomoku with source and timing logs.
zenn.devjev 同士に五目並べで対戦させたExplore this project ↗Source-linked curation
A LangChain package with TypeSafeClassifier for integrating Jev into applications.
pypi.orglangchain-typesafeExplore this project ↗Source-linked curation
A guide on integrating Jev with LiteLLM for simplified model calls through an existing proxy.
docs.litellm.aiJev through LiteLLMExplore this project ↗Source-linked curation
Val Town demo where 16 typed judgments update live as you type.
typesafe-demo.val.runTypeSafe TypewriterExplore this project ↗Source-linked curation
Independent walkthrough separating TypeSafe's published claims from public evidence.
warmersun.comTyped decisions, not chatExplore this project ↗Source-linked curation
Hosted typesafe-ai/jev for AI SDK evaluate calls, no TypeSafe waitlist required.
vercel.comJev on Vercel AI GatewayExplore this project ↗Source-linked curation
Página do criador Leonardo Bissoli com seu vídeo, capítulos e referências sobre decisões estruturadas com Jev.
leonardobissoli.comJev: decisões estruturadas e casos de usoExplore this project ↗Source-linked curation
A guide exploring Jev's architecture through 10,000 API calls.

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A resource explaining Jev Engineering methodology for AI agent development.

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Directory of Jev-based projects including repositories, SDKs, and benchmarks.

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A resource explaining Jev's capabilities, limitations, and applications as a System One model.

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Latent Space's launch-day roundup: over 100x faster and 200x cheaper than small frontier LLMs.
www.latent.spaceAINews: Jev, a System One Model that only decidesExplore this project ↗Source-linked curation
Practical guide: playground, Python and JS SDKs, raw HTTP, and the agent skill.
ziplyne.agencyAI that does not talkExplore this project ↗Source-linked curation
Japanese walkthrough of what Jev is and is not.
zenn.devTypeSafeのJevを正しく驚くExplore this project ↗Source-linked curation
The Neuron's explainer on AI decisions without a chatbot.
www.theneuron.aiJev: System One models explainedExplore this project ↗Source-linked curation
A guide explaining Jev's approach to making typed decisions rather than processing text.

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Directory listing systems using Jev for Noul, Score, and Choice questions.
jev.directoryjev.directoryExplore this project ↗Source-linked curation
Playable board games driven by Jev decisions.
jevboardgames.everpaper.appJev board gamesExplore this project ↗Source-linked curation
@ai-sdk/typesafe-ai plus experimental_evaluate; use jev-latest as an evaluation model.
ai-sdk.devVercel AI SDK providerExplore this project ↗Source-linked curation
Talk nicely or nastily over time; structured state tracks the mood.
jev-demo.vercel.appJev mood demoExplore this project ↗Source-linked curation
Technical SEO audit cost study from Boring Tools Kit where Jev ranks striking-distance fixes and content gaps by calibrated probability.
boringtoolskit.comSEO audit cost study driven by Jev triageExplore this project ↗Source-linked curation
Krunker-style 1v1 FPS where Jev decides move, aim, ADS, fire, and jump at about 9 Hz.
jev-arcade.vercel.appJev ArcadeExplore this project ↗Source-linked curation
A directory of Jev-related demos with categorization and submission options.
jevable.comJevableExplore this project ↗Source-linked curation
Jev integrates with Netlify's AI Gateway for zero-configuration use.
www.netlify.comJev on Netlify AI GatewayExplore this project ↗Source-linked curation
A tool for tracking decisions made by Jev, using Arize's instrumentation for detailed analysis.
arize.comTrace every judgment with PhoenixExplore this project ↗Source-linked curation
Free, no-signup Noul demo. Ask a question, get yes, no, or maybe, with web search when needed.
yesno.coderai.devYes / NoExplore this project ↗Source-linked curation
Browser-based request builder for the System One API: compose state plus typed Noul, Choice, and Score questions. Mock mode runs locally without an API key; Live mode requires your TypeSafe key and calls api.typesafe.ai directly. Generates typesafe_sdk Python. Includes companion Jev Suitability Test.
www.formatho.comFormatho Jev PlaygroundExplore this project ↗Source-linked curation
Small game that tests how Jev handles unknown input.
game-plan.adriaansendennis.workers.devGame PlanExplore this project ↗Source-linked curation
Guía del creador Fazt sobre el uso de Jev para decisiones tipadas, con una introducción y ejemplos de aplicaciones.
fazt.devJev de TypeSafe AI: guía de decisiones estructuradasExplore this project ↗Source-linked curation
Third-party write-up of the System One primitives, pricing, and vendor workflow evals.
www.datacamp.comJev: System One models explained (DataCamp)Explore this project ↗Source-linked curation
3D chess where Jev plays both sides, or you jump in.
chess-jev.loomens.comchess-jevExplore this project ↗Source-linked curation
One direct Jev question per row against 12–14 Jev-scored dimensions with locally fitted weights on three classification tasks: 5,477 test rows, 25,174 Jev calls, $1.43. Decomposition wins on Japanese NLI (0.9076 vs 0.8373) but flags about 25× more hard benign rows as attacks (37.2% vs 1.5%).
agentjournal.devOne judge call vs twelve dimension scoresExplore this project ↗Source-linked curation
Short practical intro with a Python ticket-triage example.
mohammedshehu.comWhat is Jev?Explore this project ↗Source-linked curation
Jev picks rotation and column from holes, stack height, and bumpiness.
jev-omega.vercel.appJev TetrisExplore this project ↗Source-linked curation
Release-week technical roundup: API, evals, adapter, and skill.
www.developersdigest.techTypeSafe Jev: the first decision-only model classExplore this project ↗Source-linked curation
A report detailing all public Jev builds in the first week, including cost, time, and repository metadata for research use.
madewithjev.comThe Jev Build ReportExplore this project ↗Source-linked curation