Jev directory
Jev Practices & Patterns
296 curated Jev entries. How to design Jev states, questions, and confidence gates the right way, from the official patterns to the failure modes worth designing around.
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296- Docs18
- Repos & sites199
- Videos7
- Posts16
- Articles56
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All 296 Jev Practices & Patterns
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Showing 193–240 of 296 resources
A reproducible English benchmark running one review-classification rubric through jev-latest and gpt-5.6-luna, publishing per-field accuracy, macro F1, latency and API-reported cost alongside the raw responses and run manifest.
Jev Practices & Patterns#community#jevbest#catalog-import
Community
mameli/jev-vs-lunaPython
mameli/jev-vs-lunaPythonA small Node.js TypeScript CLI for trying Jev on synthetic support text: one urgency question, three questions in a single request, or a latency comparison. No web server and no UI.
Jev Practices & Patterns#community#jevbest#catalog-import
Community
Menny1337/jev-labTypeScript
Menny1337/jev-labTypeScriptMeasures whether Jev can catch malicious agent skills on MalSkillBench, with a cascade arm that sends only the uncertain band to an LLM. Per-sample records, thresholds and calibration are all kept.
Jev Practices & Patterns#community#jevbest#catalog-import
Community
MohibShaikh/jev-skillbenchPython
MohibShaikh/jev-skillbenchPythonA Japanese-language repository that continuously researches TypeSafe's Jev and System One models and organises the findings as Markdown slides, a presentation script and a standalone article.
Jev Practices & Patterns#community#jevbest#catalog-import
Community
myokoym/misereru-slide-jevJavaScript
myokoym/misereru-slide-jevJavaScriptA fork of the SHADE-Arena public split that evaluates TypeSafe Jev as a monitor for covert agent sabotage, against Gemini 2.5 Flash and Pro. Thirteen hand-built transcripts across three tasks, 353 tool calls, and a full LaTeX report.
Jev Practices & Patterns#community#jevbest#catalog-import
jev-certify turns Jev's probabilities into a bounded claim: conformal risk control picks a routing threshold with a finite-sample guarantee on silently misrouted queries, and prediction-powered inference audits it with about 40 hand labels. Measured on 2,412 Jev 1.13 decisions over CLINC150.
Jev Practices & Patterns#community#jevbest#catalog-import
Community
nikkoxgonzales/jev-certifyPython
nikkoxgonzales/jev-certifyPythonA measurement study that scores Jev against gpt-5.4-mini and gpt-5.6-luna on four public classification sets, then against recorded outcomes on a few thousand real pipeline decisions. Every per-item answer and the scoring code are committed.
Jev Practices & Patterns#community#jevbest#catalog-import
Community
onlyoneaman/jev-evalTypeScript
onlyoneaman/jev-evalTypeScriptA public benchmark that scores Jev 1.13.0 on the Brazilian ENEM 2025 exam against open autoregressive baselines, reporting accuracy per subject area plus Expected Calibration Error, with a second pass that lets the model reject an item.
Jev Practices & Patterns#community#jevbest#catalog-import
Community
patryckalves/jev-no-enemPython
patryckalves/jev-no-enemPythonCLI that normalizes messy Japanese addresses to postal codes using Japan Post KEN_ALL and JIGYOSYO master data, asking Jev only for the steps rules and lookups cannot settle, and printing the probability behind each decision.
Jev Practices & Patterns#community#jevbest#catalog-import
Community
smasato/jev-jp-addressTypeScript
smasato/jev-jp-addressTypeScriptStudy of whether a calibrated judgment primitive can tell agent-written wiki pages from human ones, using the collusion.wiki corpus, Jev's Noul against a local Qwen, and a threshold sweep that finds no separating cutoff.
Jev Practices & Patterns#community#jevbest#catalog-import
Community
sypherin/jev-trace-classifierPython
sypherin/jev-trace-classifierPythonA single untitled Python file, one commit, no stars: an attempt to see how well Jev predicts financial markets, in a repository whose own description concedes that it does not do that well.
Jev Practices & Patterns#community#jevbest#catalog-import
Community
thodoh1/FinancialPredictionJevPython
thodoh1/FinancialPredictionJevPythonA MuJoCo pick-and-place pilot that runs Jev, Claude Haiku and hand-written reactive rules through the same episodes and publishes the comparison, including the parts that did not flatter Jev.
Jev Practices & Patterns#community#jevbest#catalog-import
Static chart pages comparing Jev against 110 other language models on Thai standardized exams: cost and speed plotted against accuracy, plus a page on whether its stated confidence predicts correctness.
Jev Practices & Patterns#community#jevbest#catalog-import
Community
vehas/thaiexam-jev-chartsHTML
vehas/thaiexam-jev-chartsHTMLA pre-registered adversarial evaluation of jev: nine experiments, 28 predictions fixed before any request was sent, and a report plus prompting guide regenerated from the measured logs.
Jev Practices & Patterns#community#jevbest#catalog-import
Community
willkelly/jev-evaluationPython
willkelly/jev-evaluationPythonLocal decision models that return Jev-shaped typed distributions instead of generated text: freeze a backbone, cache candidate features once, train a roughly 0.8M-parameter decision head, calibrate per primitive.
Jev Practices & Patterns#community#awesomejev#catalog-import
Community
zeredy879/minojevPython
zeredy879/minojevPythonJev run against a community reconstruction of Indonesia's SNBT 2025 entrance exam: 159 remembered questions across seven subtests, 156 scored, with every request payload and response kept.
Jev Practices & Patterns#community#awesomejev#catalog-import
Community
misaalya/snbt-jev-benchPython
misaalya/snbt-jev-benchPythonWindTunnel is a benchmark harness for browser agents. It runs the same tasks on the same self-hosted Docker sites across every interaction mode, WebMCP, code execution, DOM, accessibility tree and screenshots, and scores the resulting application state instead of judging the run.
Jev Practices & Patterns#community#jevbest
Community
nekuda-ai/WindTunnelHTML
nekuda-ai/WindTunnelHTMLSelf-hosted workbench that screens JSONL or CSV into keep, review and reject partitions, then fine-tunes your own model and reports loss and perplexity on a held-out split.
Jev Practices & Patterns#community#awesomejev
Community
RenaGao/jev-dataopsPython
RenaGao/jev-dataopsPythonAn independent poker eval against TexasSolver: Jev matches solver top actions on easy spots but shoves the nuts into traps and needs explicit hand-rank text to fold to shown flushes.
Jev Practices & PatternsArticle#community#evaluation#calibration
Community
Hands-on QA automation examples with Jev: Playwright failure classification, guardrails, RAG, API calls from Postman, and decision-focused testing.
Jev Practices & PatternsVideo#community#video#tutorial
Community
A roughly 10,000-call black-box investigation that reconstructs Jev's likely architecture: a shared state prefix, isolated question branches, and direct probability readouts.
Jev Practices & PatternsArticle#community#analysis#architecture
Community
A critical technical read of Jev's launch claims that digs into the calibration and eval numbers and asks what the architecture keeps secret.
Jev Practices & PatternsArticle#community#evaluation#calibration
Community
An independent evaluation of Jev in three retrieval stacks, with recalculated recall, latency, and cost against DeepSeek, GPT-4o-mini, and GPT-5-mini baselines.
Jev Practices & PatternsArticle#community#search#reranking
Community
A video walkthrough of the control-system pattern: a request becomes structured state, Jev returns typed decisions, and code keeps the expensive model out of every loop.
Jev Practices & PatternsVideo#community#x#video
Community
A video comparison of local Laya against cloud Jev on a Tetris agent, where the open-weights model made decisions 11 times faster on a 16 GB MacBook Air.
Jev Practices & PatternsVideo#community#x#video
Community
Scott Chacon runs hosted Jev against two local decision models, laya and kev, in a Tetris match and a GitHub Settings filter, with a public test repo.
Jev Practices & PatternsVideo#community#video#open-models
Community
A skeptical computer-use test of Jev with a public test repository, from Builder.io's Steve.
Jev Practices & PatternsVideo#community#video#computer-use
Community
A local-inference walkthrough that compares Kev, SemIf, Von, and OpenJev on consumer hardware, including Brier scores and a fake-probabilities warning.
Jev Practices & PatternsVideo#community#video#open-models
Community
A head-to-head benchmark that prices 200 products from descriptions with Jev against GPT-5.6 Luna and GPT-4.1-Nano.
Jev Practices & PatternsVideo#community#video#benchmarks
Community
A Japanese experiment that builds a rules-based gomoku harness and replays a full Jev-versus-Jev game log to measure real per-move latency.
Jev Practices & PatternsArticle#community#article#games
Community
A skeptical Japanese replication that approximates Jev's speed by reading first-token logits from small LLMs, with Gemma3 and a Mario benchmark.
Jev Practices & PatternsArticle#community#article#open-models
Community
Vercel's Pranit reports benchmarking the fx auto-mode safety classifier with Jev: about 5 to 18 times faster and more accurate than GPT-5.6 Luna.
Jev Practices & PatternsPost#community#x#benchmark
Community
A pointer to Diogo Almeida's independent working note on building a Jev harness for coding agents, including why harnesses already make these calls badly.
Jev Practices & PatternsPost#community#x#coding-agent
Community
An internal benchmark report: Jev zero-shot came within about 5 points of recall of a fine-tuned model at matched precision, at roughly $70 a month.
Jev Practices & PatternsPost#community#x#benchmark
Community
A gomoku harness that does tactical work locally before asking Jev, shrinking 225 possible moves to about 40 candidates per turn.
Jev Practices & PatternsPost#community#x#video
Community
Published evaluations of four automation workflows, security incidents, agent trace observability, invoice processing, and customer service, comparing Jev and frontier LLMs as structured workflows versus single prompts.
Jev Practices & PatternsDocs#official#benchmarks#evaluation
Official
Side-by-side benchmark of TypeSafe Jev, Qwen 3.8 27B on Cerebras, and a local Needle 3 across seven synthetic workloads, recording validated outputs, mistakes, latency, tokens, and estimated cost. Raw exports and per-scene limitations are published.
Jev Practices & Patterns#community#typescript#benchmarks
CLI that fits a per-question confidence threshold to a target accuracy on your own labeled data, verifies it on a held-out split, estimates how much traffic still needs an LLM, and re-checks locked thresholds in CI. It publishes no Jev results of its own.
Jev Practices & Patterns#community#python#calibration
Community
abhixhek/jevcalPython
abhixhek/jevcalPythonReranking benchmark that gave Jev, Cohere Rerank 4 Pro, ZeroEntropy zerank-2, and DeepSeek the same thirty BM25 candidates across eight English datasets, publishing saved responses, scoring code, and paired-bootstrap intervals. Jev's rubric scored 0.692 nDCG@10 against Cohere Pro's 0.691.
Jev Practices & Patterns#community#python#search
Community
anessbelbati/jev-rerank-benchPython
anessbelbati/jev-rerank-benchPythonA personal-assistant agent with 100 mocked tools that measures how many steps a task takes when the LLM picks the tool versus when Jev picks it before every model step.
Jev Practices & Patterns#community#typescript#agents
Community
vinilana/jev-eval-agentHTML
vinilana/jev-eval-agentHTMLBlind security benchmarks for Jev on public corpora: 662 prompt-injection messages and 200 matched vulnerable-code pairs, with raw per-sample results and a TUI dashboard.
Jev Practices & Patterns#community#go#benchmarks
Community
Gaurav-Gosain/jev-sec-benchGo
Gaurav-Gosain/jev-sec-benchGoAn exploratory study of zero-shot ham, spam, and phishing classification with Jev: enriched email context raised main-set accuracy from 93.62% to 98.64%, within 0.23 points of a trained TF-IDF baseline.
Jev Practices & Patterns#community#python#evaluation
An independent open reproduction of the System One model class: Qwen3.5-based 2B and 35B mixture-of-experts models that return typed Choice, Score, and Noul probabilities in one forward pass, with nothing distilled from Jev.
Jev Practices & Patterns#community#python#open-models
Community
Mapika/deciderPython
Mapika/deciderPythonAn independent baseline that reads typed option probabilities straight from a frozen Qwen3.5-4B's logits in one forward pass, reproducing Jev's interface pattern with open models rather than Jev's undisclosed model or training.
Jev Practices & Patterns#community#python#open-models
Community
TheoLeeCJ/SemIfPython
TheoLeeCJ/SemIfPythonA benchmark that runs Jev on all 6,257 text traces of Who&When Pro to attribute agent failures, scoring it with the official pinned scorer against the paper's GPT-5.4, Claude Sonnet 4.6, GLM-5, and Qwen3.5-122B baselines.
Jev Practices & Patterns#community#python#benchmarks
Apache-licensed, locally runnable Jev-style decision models (0.8B, 4B, 9B on Qwen3.5) with released weights, training code, a System One-compatible server, frozen eval suites, and a playground.
Jev Practices & Patterns#community#python#open-models
Community
jaredpalmer/kevPython
jaredpalmer/kevPythonA graded relevance evaluation of Jev as a reranker: 9,831 labelled pairs from 164 queries over a 33,047-item skills catalog, comparing Jev score reranks with BM25, bge-m3, and rank fusion.
Jev Practices & Patterns#community#python#search
An independent calibration study of Jev over three public benchmarks and 900 rule-generated support tickets, publishing every raw Gateway response and the quantization limits of returned probabilities.
Jev Practices & Patterns#community#python#calibration
Community
scienthoon/jev-ood-calibrationPython
scienthoon/jev-ood-calibrationPythonIndex of all 296 entries
- Jev + Claude Code case study
- SystemOne in SeerScore: workflow review
- SystemOneAffordance
- Jev isn't tricked by ordering, and the others are.
- Jev Does Not Play Dice — kantahayashiai.github.io
- Images and Assets (Dreamer-Ready)
- Box Questions (Dreamer-Ready)
- JevCoder: When Does Decision Delegation Pay Off in Code Repair? (arXiv 2610.19596)
- Jev-Guided Strategy Bandit: Multi-Dimensional Judge Feedback for Query-Efficient Jailbreak Attacks (arXiv 2610.19971)
- Jev Engineering: Typed Decision Systems for Reliable Agent Workflows
- Jev Lab — pasblinn
- Using Jev in Domain Abuse Review: A Workflow Design
- A Thermometer, Not an Analyst: A Text Judge in a Trading Lab
- Laya in shadow, next to Jev on every request
- Jev handed our LLM the wrong page a tenth as often as our embeddings
- Jev review: tested against Fable on 520 posts
- Jev in practice: typed decisions, scoped authority
- Routing Agents with Jev and Laya: Adding System One Decisions to Quarkus LangChain4j
- Recalibrating Many Questions with Few Labels: Minimax Rates and Identification Limits (arXiv 2610.18488)
- Consider, Then Choose: Order-Invariant Decisions in System One Models (arXiv 2610.18233)
- Code Owns the Simulation, Jev Owns the Evaluation (arXiv 2610.01834)
- Judgement in the Age of Jev: From Evaluation Scarcity to Evaluation Abundance (arXiv 2610.01231)
- Hidden Risks of Jev: An Empirical Study of Security, Privacy, and Dual Use (arXiv 2610.04985)
- HydroJEV: A one-second, training-free screen for cyber-attack and fault attribution in water distribution networks (arXiv 2610.02048)
- Calibrated Decision Models for Autonomous Penetration-Testing Harnesses: JEV and Laya as System One Decision Layers for LLM-Driven Pentest Agents (arXiv 2609.28940)
- Decision Hijacking: Prompt Injection Attacks on Jev's Typed Probabilistic Decisions (arXiv 2609.28613)
- RSAJEV: Training-Free Abstaining Prototype Memory for Eliminating Silent Hallucination in JEV-Based Remote Sensing Classification (arXiv 2610.15742)
- FastJEV: Understanding Redundancy for Compact JEV Inference (arXiv 2610.11379)
- System Switch: When Should a Fast Decision Model Stop and Think? (arXiv 2610.09683)
- Can Jev be Your Q or Policy in Reinforcement Learning? (arXiv 2610.11692)
- Visual Jev Rewards: Reference-Bound Verification for Multi-Subject Image Generation (arXiv 2610.09328)
- From Probabilities to Decisions: Search and Multi-Teacher Distillation with Jev (arXiv 2610.09188)
- JevCascade: Readout Stability and Inference-Time Compute Allocation for Prefill-Only Decision Models (arXiv 2610.07716)
- Labels Override Definitions in Jev-Style Typed Decision Models (arXiv 2610.02586)
- Student-Guided Teacher Distillation for Efficient LLM Task Routing: Positioning Against Jev-Style System-1 Classifiers (arXiv 2610.02516)
- LLM-as-Jev: LLMs Are Already Jev-Style Decision Models -- When and How to Fine-Tune Them (arXiv 2610.02076)
- More Choices, Fewer Decisions: Ordinal-Scale Bias in JEV-like Direct-Decision Models (arXiv 2609.38827)
- Dyad: Extending Large Language Models with Native Typed Decision-Making (arXiv 2609.36116)
- Koa-decision: Fast and Consistent Structured Decision Making with Generative LLMs (arXiv 2609.36115)
- PACT: Pairwise-Anchored Calibrated Tuning for Single-Token Typed Decisions (arXiv 2609.35865)
- Type-Safe Is Not Error-Free: Typed Decision Models Follow the Option Name, Not the Definition Bound to It (arXiv 2609.26758)
- JevOut: Natural Context Can Flip Decision Models (arXiv 2609.30243)
- JevForest: Path Voting for Budgeted Feature Acquisition (arXiv 2610.10615)
- Emo-Jev: Probabilistic Reasoning for Emotion Classification with Jev (arXiv 2610.08829)
- When the Right Answer Is Missing: An Arithmetic-Dependent Rejection Bottleneck in Jev (arXiv 2609.39496)
- Decide, Don't Generate: Competitive Dimensional ABSA with Jev's Typed Decisions (arXiv 2609.35293)
- Calibrated Decisions at Scale: Converting Police Crash Narratives into Probabilistic Crash Variables with a System One Model (Jev) (arXiv 2609.24052)
- Reading Right, Acting Wrong: Diagnosing Decision Failures of System One Models in Agent Loops (arXiv 2610.18579)
- Orcha Jev Judgment Spike
- Jev in the Wild (arXiv 2609.30216)
- Jev-Driven SRE Diagnosis: What Worked and What Failed
- Auto-optimizing Jev: Half the Errors, 1/7 the Cost
- Jev Local — Argos1111
- Jev Calibrate
- Jev On A Laptop
- Jev Column Race
- Jeval — rlaope
- Jev RAG Benchmark
- System One — sgoedecke
- System One Open
- TypeAR
- Jev_apps
- Dejevu
- Openvons
- Jev Stock
- Jev Project Context
- AnyDecisionModel
- Jevmory
- Jev.nu
- Hermes And Jev Play Minecraft
- Local Jev — amithgc
- Eikos Arena
- Nanojev Arena
- Laya Browser Agent
- Kev — arjun988
- TypeSafe Local
- Jev Search — larguesa
- Learn Jev End To End
- Decision Index
- LegalForecastBench
- Jev Korean Benchmark
- Jev Lm — y0usaf
- Claude Jev — buchmark
- Jevchess — choxos
- Jevbench — dhruvmehra
- Jev Agent Authorization
- Daf Jev
- Jev Align — caiovicentino
- Jev Codes
- OpenJev — GPT-AGI
- Jevarena — chenmingtang830
- Jev Reward Model Evaluation
- Jev Realtime Trading
- Jev Bot — nssmd
- Jevloop — parkavenue9639
- Sysone Bench
- Jev Model Tokengate
- Reflexbench
- Jev Chat — adhyaay-karnwal
- Openjev — DECRUX9812
- Jev Behavior Study
- Tenbin
- Jev — cobusgreyling
- Jevtest — realZachi
- Rh Guard
- ORIGIN-CIVILIZATION
- cu-Jev
- Jev As Quant
- Ego Jev Ultrafast
- Jev Storyboard Lab
- Jet
- Jev Benchmark — YidiDev
- Cairn Jev Lab
- Jev Guardrails — deepansh-saxena
- System One Gemma
- Jevgpt — Bewinxed
- Trade Jev
- Jev Does Not Play Dice — KantaHayashiAI
- Mcts Agent
- Jev Gate — MongLong0214
- Jev Exploration
- Jev Benchmark — wondertwins
- Siftr
- Jev Mode — ddfeyes
- Research Desk
- Jev Chess — hemanth
- TypeSafe Chess — Dimesio
- Toolgate — RiskAverseTech
- Jev Starter — hamakyo
- Jevbus
- Watfile
- Jevshield
- Polymarket Btc 5M Agent
- TypeSafe Jev MCP
- Ruby LLM Providers TypeSafe
- Jev MCP Server — wangkuangkuang
- Metask Jev
- Bes Kelime Jev
- Dsh Jev Decide
- Jevalyzer
- Jev Deepresearch
- Jev X Kit
- Jev Bot — bl888m
- Openpave Jev
- Jev Reviews
- Open System One
- Jev System One Reference
- Jev Dllm
- Paper Package
- Decisionbridge
- RISC-jeV
- Jev Freeform
- Typed Decisions
- Jev Synergy Screening
- Stuntdouble
- Qwen Rlcd
- Kyotsu AI Bench
- Jev Routing Experiment
- Openjev Experiments
- Padflow Jev Evals
- Jev Carryforward
- Modelsystem
- TypeSafe Vs DeepSeek
- Jev Labs
- Openpoke Meets Jev
- What Is Jev
- Jev Benchmark — themsquared
- System One Security Triage
- Openjev Multimodal
- Yc Jev Bench
- Rerank Bench Jev
- System One — mpuig
- Can Jev Play
- Jev-Research-Index
- LetJevDecide
- Decide — gopaljigaur
- System One Router
- MEDJEV — PAI-CUHK
- Jev Filter
- Jev Zig CLI
- Typesafe_chess_eval
- Jev Shadcn Lint Eval
- System One Adapter Rust
- Jev Deferred Crispification
- Jev Alpha Bench
- Jev Headline Bench
- Jev Report
- Jev Finance Benchmark
- Jevals Data
- Jev Calibration Audit — jujumilk3
- Labs
- Jev Anotacao Sentencas
- Jev Vs Luna
- Jev Lab — Menny1337
- Jev Skillbench
- Misereru Slide Jev
- Shade Arena Jev Monitor
- Jev Certify
- Jev Eval — onlyoneaman
- Jev No Enem
- Jev Jp Address
- Jev Trace Classifier
- FinancialPredictionJev
- Jev Pick And Place Study
- Thaiexam Jev Charts
- Jev Evaluation
- Minojev
- Snbt Jev Bench
- WindTunnel
- Jev Dataops
- Jev is the fish at the poker table
- Jev AI Model in Action: 5 Practical QA Use Cases + Hands-On Demo
- Jev's Architecture Unmasked
- Jev: The Language Model That Won't Talk
- Jev in Search: Three Practical Evaluations
- Jev Engineering: turning an agent stack into a control system
- Local Laya vs cloud Jev on Tetris
- What is Jev? (and is laya better?)
- Is Jev actually good at computer use?
- Run a Jev-Style Model on Your Own GPU
- Is Jev Really Better, Faster and Cheaper? I Put Jev To Test vs. Luna
- Jev vs Jev in Gomoku
- Can LLMs Do What Jev Does? A Replication Attempt
- fx auto mode benchmarked with Jev
- A working note on Jev harnesses for coding agents
- Jev within 5 points of a fine-tune
- Shrinking gomoku from 225 moves to 40
- Workflow evals
- TypeSafe AI Benchmark
- Jevcal
- Jev Rerank Bench
- Jev Eval Agent
- Jev Sec Bench
- Zero-shot email classification with TypeSafe's Jev
- Decider
- SemIf
- Jev Agent Failure Benchmark
- Kev — jaredpalmer
- Jev Search Rerank Eval
- Does Jev know when it doesn't know?
- Jev vs LLM: a phishing decision benchmark with a calibration audit
- Jev Secret Detection
- Jev Benchmarks
- Little Airways
- Janus
- Jev Research Eval
- Jev Playground — hegargarcia
- openJev-verdict-2.0
- Jev DSPy Lab
- Jev Orderby Bench
- JevBench — fstandhartinger
- ASSAY-001
- Jevbetter
- Openjev — daseinlabs
- OpenJev (Verdict)
- Reflex — kshetrajna12
- Jev as a judge for agent evals
- Jev Arena
- Jeff — logan-markewich
- Jev Capability Atlas
- JEVfire
- Poorjev
- Mini-Vibe Check: TypeSafe's Jev Judged Everything I've Written in 0.7 Seconds
- Jev: one judge call, or twelve dimension scores? I measured both on three tasks
- Testing Jev on public and private data: classifier or filter?
- An early-access test of TypeSafe's Jev: calibrated judgments for half a cent
- Testing TypeSafe Jev, Mistral and Gemini for local event validation
- How Much Does a Technical SEO Audit Cost in 2026?
- Jevals — Independent Jev Benchmark for Models That Decide
- A 706K-parameter form filler
- Security decisions that fit Jev
- Reranking 33,047 catalog entries
- Inferring Jev's internals from 1,000 calls
- State
- Jev 1.13 Jaggedness
- Choice
- Score
- Noul
- Advanced: Structure
- Pattern: Composite Scoring
- Pattern: Confidence-Gated Routing
- Pattern: Speculative Fan-Out
- Pattern: Intent Routing
- Building with Jev
- What Can You Build With Jev? Documented Use Cases
- Jev in the Agent Runtime
- Typed Decision Models: Jev and Laya in Agentic AI
- Jev as an LLM Judge
- Jev Beats Gemini Flash Lite on a Classifier Eval
- On Jev-Scored Compaction: A Critique
- Jev + WebMCP Breaks a Benchmark
- Primitives: Choice, Score & Noul
- Confidence
- Patterns
- How to Build with TypeSafe
- Example Use Case Map
Start here with the Jev AI model
Featured entries in practices & patterns.
The box question type: one bounding box per question, returned as four edges that are fractions of the image, plus confidence, with no criteria field and no not-found value.
Jev Practices & PatternsDocs#official#docs#vision
Official
Published evaluations of four automation workflows, security incidents, agent trace observability, invoice processing, and customer service, comparing Jev and frontier LLMs as structured workflows versus single prompts.
Jev Practices & PatternsDocs#official#benchmarks#evaluation
Official
Apache-licensed, locally runnable Jev-style decision models (0.8B, 4B, 9B on Qwen3.5) with released weights, training code, a System One-compatible server, frozen eval suites, and a playground.
Jev Practices & Patterns#community#python#open-models
Communityjaredpalmer/kevPython
jaredpalmer/kevPythonJev AI model articles
Original guides that go deeper on Jev practices & patterns.
Jev's compaction tools keep or drop tool calls instead of summarizing them — the thresholds they fire at, the savings they report, and why 1.14's opt-in 262k context doesn't settle the choice.
Jev Practices & Patterns#compaction#long-context#coding-agents
Read article
Per-tick buy/sell calls on Monad, a five-sleeve Hyperliquid desk, Nifty-50 rankers, and Polymarket confidence gates: how the catalog's trading repos wire Jev in without asking it to predict prices.
Jev Practices & Patterns#trading#markets#gates
Read article
How the box question type turns a crop into a decision: four fractional edges, a presence Noul for missing targets, the cut-off problem, and two patterns worth building.
Jev Practices & Patterns#vision#box#patterns
Read article
From the Jev community
Watch walkthroughs, read the threads, and see what builders are posting.
YouTube: A podcast segment on TypeSafe AI, its $40M raise, and the Jevons paradox behind the name.
YouTube: Gary Explains the catch: Jev understands natural language but answers with structured values and confidence.
YouTube: Sam Witteveen on System 1 thinking, then Choice, Score, and Noul demos, and chained actions.
Hacker News: Pipeable onesie CLI with shell-safety exit codes and a calibrate mode over labelled commands.
frodikarlsson3 pointsShow HN: onesie – An expressive Unix-pipeable CLI for System One models like JevRead the thread on Hacker NewsHacker News: Spoken-language learning with video scenes branching on TypeSafe Jev.
j_rcht1 pointShow HN: Worklaude – learn by speaking; video scenes branch on TypeSafe JEVRead the thread on Hacker NewsHacker News: OpenAI's Luna Decisions API framed as a fast follow to TypeSafe's Jev wave.
matt_d6 pointsOpenAI Answers TypeSafe's Jev with a Decision API Built on LunaRead the thread on Hacker NewsHacker News: Nikola Balić on what made the Jev launch easy to try and easy to share.
nkko2 pointsWhat TypeSafe Got Right with the Jev LaunchRead the thread on Hacker News