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A FIELD GUIDE TO JEV / VOL. 01

SMALL
DECISIONS.
BIG
POSSIBILITIES.

The best of Jev. Real projects, practical guides and ideas from across the internet.

1,198resources16languages
TypeSafe AI THE OFFICIAL SIGNAL 4 HIGHLIGHTS
Diogo Almeida@CompleteSkepticLAUNCH POST

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.

Start with the Launch Post. Explore four official signals.

114 resources

AI-assisted summaries and translations. Check original sources for context and performance claims.

kshetrajna12

reflex

A small open decision model: state + typed questions -> calibrated probabilities. A Jev / System One re-creation on Qwen3.5.

reflex
Research & dataEnglish

Source-linked curation

www.youtube.com

I paired Jev with Astra

A YouTube guide discussing Jev's functionality, pricing, and performance comparisons with Astra, including benchmarking and parallel decision analysis.

I paired Jev with Astra
Research & dataEnglish

Source-linked curation

ikermoel

open-alternative-jev

Open alternative to Jev: typed, calibrated decisions from any open-weights LLM in one forward pass (HF + vLLM), with benchmarks.

open-alternative-jev
Research & dataEnglish

Source-linked curation

Zaious

jev-capability-atlas

Independent, evidence-based map of when TypeSafe's Jev actually holds up vs. breaks down — real API-call receipts, not a leaderboard. 中文為主的雙語 repo。

jev-capability-atlas
Research & dataEnglish

Source-linked curation

ShuhanSun

jev-oas-sentinel

Catch breaking API behavior hidden in OpenAPI prose with deterministic checks and TypeSafe JEV System One semantic review.

JEVLAB decorative pixel illustration; not source mediaJEVLAB ART
Research & dataEnglish

Source-linked curation

zwliJay

JevForge

End-to-end Jev-style structured-decision stack for auditable data construction, Qwen3.5-0.8B training, fixed Mind2Web and OOD evaluation, preliminary RLCD, local serving, and interactive replay.

JEVLAB decorative pixel illustration; not source mediaJEVLAB ART
Research & dataEnglish

Source-linked curation

AbdelStark

jev-benchmarks

Probability-aware evaluation for typed decision models: calibration, selective risk, latency, and reproducible benchmarks.

JEVLAB decorative pixel illustration; not source mediaJEVLAB ART
Research & dataEnglish

Source-linked curation

Will Kelly

jev-evaluation

A research project on GitHub conducting nine experiments and 28 predictions with fixed parameters, focusing on Jev's performance metrics.

JEVLAB decorative pixel illustration; not source mediaJEVLAB ART
Research & dataEnglish

Source-linked curation

shamazharikh

qwen-rlcd

Jev-style calibrated decision model (Choice/Score/Noul) on Qwen3.5-0.8B.

JEVLAB decorative pixel illustration; not source mediaJEVLAB ART
Research & dataEnglish

Source-linked curation

1 clicks / 7d
anandi1989

awesome-jev-usecases

Evidence-backed index of real-world Jev (TypeSafe AI System One) use cases: repos, patterns, benchmarks, and measured results.

JEVLAB decorative pixel illustration; not source mediaJEVLAB ART
Research & dataEnglish

Source-linked curation

TheoLeeCJ

SemIf

Semantic ifs from open models, on a 3090 at home. Independent; not affiliated with Jev or TypeSafe.

JEVLAB decorative pixel illustration; not source mediaJEVLAB ART
Research & dataEnglish

Source-linked curation

wfzyx

von

The open-source System One decision model. Sub-15ms, non-autoregressive, local drop-in alternative to TypeSafe Jev.

JEVLAB decorative pixel illustration; not source mediaJEVLAB ART
Research & dataEnglish

Source-linked curation

AkashPriyadarshii

jev-curate

High-throughput synthetic & pretraining dataset sifter powered by TypeSafe AI Jev (api.typesafe.ai). Stream, filter, and score Parquet & JSONL datasets at 1,500+ rows/sec using System One typed decisions (Choice, Score, Noul).

JEVLAB decorative pixel illustration; not source mediaJEVLAB ART
Research & dataEnglish

Source-linked curation

0xnairb

research_desk

TypeSafe Jev demonstration for new analyzation — experimenting with Jev for fast analysis of news and tickers.

JEVLAB decorative pixel illustration; not source mediaJEVLAB ART
Research & dataEnglish

Source-linked curation

adhyaay-karnwal

jev-chat

A chatbot from typed Jev decisions: hierarchical speculative decoding over System One probabilities.

JEVLAB decorative pixel illustration; not source mediaJEVLAB ART
Research & dataEnglish

Source-linked curation

razorback16

openjev

Open, Jev-compatible System One decision server on DiffusionGemma.

JEVLAB decorative pixel illustration; not source mediaJEVLAB ART
Research & dataEnglish

Source-linked curation

zhihz

openjev (zhihz)

Local bilingual probability decisions from context, questions, and candidate answers. Independent research preview inspired by TypeSafe Jev.

JEVLAB decorative pixel illustration; not source mediaJEVLAB ART
Research & dataEnglish

Source-linked curation

jtsang4

jev-cli

CLI for TypeSafe AI's Jev evaluation model — typed questions in, structured JSON answers out.

JEVLAB decorative pixel illustration; not source mediaJEVLAB ART
Research & dataEnglish

Source-linked curation

zsavage8

padflow-jev-evals

Typed-decision benchmark from PadFlow (land development SaaS): schemas, anonymized labeled rows, and a runner for confidence-calibrated models like TypeSafe Jev.

JEVLAB decorative pixel illustration; not source mediaJEVLAB ART
Research & dataEnglish

Source-linked curation

SiliconLabAI

OpenJev

An open-source project aiming to develop a Jev-class decision model for research purposes.

JEVLAB decorative pixel illustration; not source mediaJEVLAB ART
Research & dataEnglish

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Ahmad Sofi-Mahmudi

Jev Reviewer

Tool for systematic reviewers to extract information from research articles efficiently.

Jev Reviewer
Research & dataEnglish

Source-linked curation

jh1373

jev-search

Offline Obsidian search with optional Jev reranking of results, requiring user approval before reranking.

jev-search
Research & dataEnglish

Source-linked curation

pithings

advocaat

A small, type-safe client for asking AI questions about your data, powered by TypeSafe Jev.

JEVLAB decorative pixel illustration; not source mediaJEVLAB ART
Research & dataEnglish

Source-linked curation

Nick DeJesus 🛒🎉 - Former Unpaid CTO @BTPipeline

Jevals

Jevals is a local testing environment for evaluating Jev requests and improving results through primitive operations.

Jevals
Research & dataEnglish

Source-linked curation

realZachi

jevtest

Semantic test matchers for Vitest and Jest, powered by TypeSafe's Jev model. Write expectations in plain English, get calibrated probabilities back.

JEVLAB decorative pixel illustration; not source mediaJEVLAB ART
Research & dataEnglish

Source-linked curation

AntonioCoppe

jev-harness

Decision harness for TypeSafe Jev — confidence gates, shadow mode, recipes, and evals. Claude CLI 48.9s → Jev 1.3s on the same row-filter job.

JEVLAB decorative pixel illustration; not source mediaJEVLAB ART
Research & dataEnglish

Source-linked curation

keltokhy

jsort

Sort by meaning: order lines along a plain-English dimension, from pairwise comparisons judged by TypeSafe's Jev model.

JEVLAB decorative pixel illustration; not source mediaJEVLAB ART
Research & dataEnglish

Source-linked curation

Heman10x-NGU

openJev-verdict-2.0

Calibrated 151M Non-Autoregressive Decision Engine beating TypeSafe Jev & Laya on LocalLLaMA/typed-decisions (77.10% acc, 0.0636 Brier, 0.0144 ECE).

JEVLAB decorative pixel illustration; not source mediaJEVLAB ART
Research & dataEnglish

Source-linked curation

JackZeng

Jev_apps

看看 Jev 能做什么:用中英文讲清热门应用、工作原理和各自优缺点。Explore Jev apps with plain-language examples, explanations, and comparisons.

JEVLAB decorative pixel illustration; not source mediaJEVLAB ART
Research & dataEnglish

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mithalouni

system-one-open

Open replica of TypeSafe's Jev: typed calibrated decisions in one forward pass, on Gemma 4 E2B / Gemma 3 270M (Modal).

JEVLAB decorative pixel illustration; not source mediaJEVLAB ART
Research & dataEnglish

Source-linked curation

Mapika

decider

One-pass typed decisions with calibrated probabilities (System One style model), fine-tuned from Qwen3.5-2B.

JEVLAB decorative pixel illustration; not source mediaJEVLAB ART
Research & dataEnglish

Source-linked curation

Gaurav-Gosain

jev-headline-bench

Can Jev pick the winner of a real headline A/B test? 64.5% across 10,984 Upworthy randomized experiments, 74.7% when the difference was decisive.

JEVLAB decorative pixel illustration; not source mediaJEVLAB ART
Research & dataEnglish

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Gaurav-Gosain

jev-sec-bench

Blind security benchmarks for Jev, TypeSafe's System One model: prompt injection and vulnerable code detection, built on jev-go.

JEVLAB decorative pixel illustration; not source mediaJEVLAB ART
Research & dataEnglish

Source-linked curation

HackSing

jev-report

发明 RLHF 的人,这次做了个不会说话的模型:Jev 独立研究报告。52 页 PDF + 50 条中文实测复现包 + 143 条可回溯数据表.

JEVLAB decorative pixel illustration; not source mediaJEVLAB ART
Research & dataEnglish

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y0usaf

jev-lm

A word-level language model whose output layer is Jev: n-gram drafter, Noul chunk verification, bits-per-token eval.

JEVLAB decorative pixel illustration; not source mediaJEVLAB ART
Research & dataEnglish

Source-linked curation

fabricioctelles

modelsystem

Curated catalog of System One / Decision Models — contributions for modelsystem.one.

JEVLAB decorative pixel illustration; not source mediaJEVLAB ART
Research & dataEnglish

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Jökull Sólberg Auðunsson

ensk

A research project featuring an English–Icelandic dictionary that uses Jev to rerank results for better accuracy.

ensk
Research & dataEnglish

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ishantanu

jevmetrics

OpenTelemetry Collector connector that uses Jev to assess metric metadata and apply retention policies before export.

JEVLAB decorative pixel illustration; not source mediaJEVLAB ART
Research & dataEnglish

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lab-dados

jev-anotacao-sentencas

Jev (TypeSafe) vs. Gemini 3.8 Flash vs. GPT-5.6 Luna na anotação estruturada de sentenças do TJSP: qualidade, tempo e custo.

JEVLAB decorative pixel illustration; not source mediaJEVLAB ART
Research & dataEnglish

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replynodes

jev-web-analyzer

See what Jev thinks about your SaaS website — powered by ReplyNodes web context and Vercel AI Gateway.

JEVLAB decorative pixel illustration; not source mediaJEVLAB ART
Research & dataEnglish

Source-linked curation