Melvin Vivas
@melvindvivas
We can use this for Codex limits real-time sentiment analysis lol Jev + ElevenLabs
XTools and apps
PickUpdated Oct 12, 2026
838 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.

Diogo Almeida
@CompleteSkeptic
After co-inventing ChatGPT, I kept asking myself: why have superhuman chat models not led to AGI? I’ve spent the last 2 years in stealth building a new way to train models (RLCD), and a new type of frontier AI model that we are releasing today: Jev • 20-200x faster • 40-400x cheaper (w/ output tokens free) • Frontier composable intelligence optimized for decisions AFAICT the shortest path to AI-based economic revolution
Melvin Vivas
@melvindvivas
We can use this for Codex limits real-time sentiment analysis lol Jev + ElevenLabs
XTools and apps
PickPackapun
@packapun
New kid on the block typesafe.ai/blog/introduci…
XBenchmarks and evals
Nikkhil Narang
@acenik10
Your agent doesn't need a bigger brain. It needs a faster one. Most agent decisions are tiny — urgent or not, which queue, yes/no. We run them through frontier models anyway. TypeSafe's new Jev does it in milliseconds for a fraction of the cost. #AIAgents #Jev
XBenchmarks and evals
NO1ennn
@N01ennn
x.com/i/article/2103…
Guidex.com
N01ennn's long guide: mark the decisions in an agent loop, move them off the frontier model, and measure the result. Its best part is the arithmetic for why routing down and back up can cost more than never routing.
Tuan N
@__tuan____
Sooner or later everyone will come to realize System One Paradox or Jev Paradox is real. The inevitable path forward is System One Plus or System One+. x.com/__tuan____/sta…
XBenchmarks and evals
Pitofui
@Pitofuii
LLM をゲームで使ってて一番困ってたのが、考える時間の長さ。Agent 同士でリアルタイムに戦わせるのが、なかなか難しかったんですよね。 今回、@typesafeai の #Jev にアクセスできるようになったので、ゲームに組み込んで Sonnet Fast と動かしてみました。どんな感じかは下の動画を見てください! 次は 5 秒のターン制限を外して、Laya と Jev をリアルタイムで戦わせてみようかな。
XGames and real time
Mentis 🇦🇺
@adam_x_mentis
Gonna be… Massive! Here’s the pipeline architecture for the agentic pipeline. @typesafeai’s Jev super fast decision engine at the core. 👀🕳️🐇 🔥🚀🤖
XAgents and browsers
Gipp 🦅
@gippp69
x.com/i/article/2103…
Guidex.com
Gipp prices a four-lane event desk and shows where the bill ends up: in the share of events that go to a writing model. Includes an audit lane for the ignored events and a daily bill script. The bill figures are assumed rates, not invoices.
Alex
@AlexanderTw33ts
Jev is 9.5 hours into his 10 hour livestream and his question api has 16 paying customers chatwithjev.com
Han Keo
@KeoGrowth
En regardant Jev et Recursive Mass, je peut être sûr d'une chose les LLM ne sont pas la voie royal pour être le cerveau des agents, du moins pas pour longtemps. Jev même n'est pas encore au top du top sur ces probabilité montre déjà ces preuves pour ses prises de décision (plus rapide que des LLMs) Et Le Recursive Mass (pensées latentes sous forme de nombres) montrent qu'il est plus efficace pour les agents de communiquer entre eux partageant leu états internes plutôt que générer du texte compréhensible par des humains. Une chose est clair, on ne doit pas utiliser les IAs pour nos agent commet on les utilises pour nos discussions. Les Modèles n'ont pas fini d'évoluer :)
XSales and leads
Jim Merioles
@jimmerioles
Yep, best ELI5 on TypeSafe's Jev:
XBenchmarks and evals

Erik Spock Gafni (hiring!)
@EGafni
my personal faves are: AutoResearch for Feature Extraction Use LLMs to generate Jev questions's who's probabilities are fed into a classic ML algorithm like logistic regression to predict a label. Hierarchical Classification Traverse a classification taxonomy using Jev and beam sesarch. Jev is great for graph traversal.
Guidex.com
Erik Gafni of TypeSafe names his favourites from the cookbooks. AutoResearch for feature extraction: an LLM writes Jev questions, and their probabilities feed a classic algorithm such as logistic regression to predict a label. Hierarchical classification: traverse a taxonomy with Jev.
Zenko | NeuralFrame Labs
@NeuralFrameLabs
Local Laya beats Jev 100% #localai #ainews #ai #laya #jev
XOpen source
Edwin Mesa
@edwinfmesa
Explorando qué se puede hacer con Jev y Laya, que (los de moda), me pregunté si podrían ayudar a un agente de soporte a preparar el contexto mientras el usuario escribe su mensaje. El contexto es clave para un LLM, así que armé una startup ficticia con 7 documentos. 🧵
XContext and memory
𝗿𝗮𝗺𝗮𝗸𝗿𝘂𝘀𝗵𝗻𝗮— 𝗲/𝗮𝗰𝗰
@techwith_ram
TypeSafe Founder's Blueprint for Building with Jev. Check out the pdf here: drive.google.com/file/d/17h982x…
XBenchmarks and evals
Trackmind
@0xTrackmind
x.com/i/article/2106…
Guidex.com
Trackmind’s X article on Claude loops that run unattended, with Jev as the decision layer.
dealer.eth
@dealerdefi
I LEAKED THE JEV STACK I RUN MY AGENTS ON, IT CAUGHT 11 OF THEM IN ONE NIGHT BEFORE THEY BROKE SOMETHING Agents don't fail at writing code, they fail at deciding, which file to open, which hunk matters, whether to run that command, whether they're actually done. Every one of those comes back as a paragraph you have to parse, and none of them come back with a number telling you how sure it was. So I made them typed, a confidence on every answer, and a gate written in code, not in the model, that acts, holds, escalates or refuses. Ran it on my own repo last night, 30 tasks, 4 agents in parallel, 360 judgments at 311 ms each, four cents for the whole thing. 19 shipped with nobody watching, 11 got stopped cold. Those 11 are the whole product.
XAgents and browsers
PickTypeSafe AI
@typesafeai
LLMs distilling Jev like
XOpen source
PickASI Hub
@ASIHubHQ
DEEP DIVE REPORT: TYPESAFE AI LAUNCHES JEV SUB 100MS SYSTEM 1 DECISION ENGINE EXECUTIVE BRIEFING Routing routine classification tasks through a 70 billion parameter language model is architectural malpractice. TypeSafe AI has introduced Jev, a sub 100 millisecond deterministic decision engine proving that single pass probabilistic heads dramatically outperform bloated models on System 1 tasks. 1. THE ARCHITECTURAL DILEMMA Enterprise AI architectures suffer from catastrophic inference latency. Standard multi turn agentic loops invoke heavy reasoning models for simple deterministic gates, resulting in multi second roundtrips and unsustainable cloud compute costs. Jev restructures decision topology by executing fixed logit classification in single forward passes at 70 millisecond latency. 2. FOUR HUNDRED TIMES COST EFFICIENCY Empirical benchmarks demonstrate 400x reduction in compute expenditure per decision token. By constraining entropy to predefined domain spaces, Jev eliminates model hallucinations while providing mathematically verifiable confidence scoring across decision boundaries. 3. 2027 TO 2030 OUTLOOK By 2027, over 80% of autonomous software agent workflows will execute on dedicated System 1 kernels like Jev. Frontier multi modal models will operate purely as supervisory reasoning nodes, invoked only when high entropy creative synthesis is strictly required. Strategic takeaway: Compute efficiency dictates architectural survival. Split your system into fast reflex execution and slow deliberative reasoning.
XBenchmarks and evals
Asteri
@Asteri_eth
Claude + Jev is the first agent setup where I stopped babysitting every single step most agents burn frontier tokens on tiny calls like "retry?" or "enough sources?". this one hands them to a model that does 10,000 decisions for ~$0.42 10 min and it runs on your machine: prompt → Claude → Jev picks the move → gate checks confidence → Claude executes → logged result step 1 → get your Jev API key on the TypeSafe site step 2 → clone the router from the GitHub below and install it in one line: python3 -m venv .venv && .venv/bin/pip install -r requirements.txt && cp config.example.yaml config.yaml step 3 → export the key before the first run: export TYPESAFE_API_KEY='YOUR_KEY' put the same line in ~/.zshrc or ~/.bashrc so a fresh terminal doesn't lose it step 4 → give Claude skill/jev-decision-layer.SKILL.md and point it at src/router.py + recipes/. on its own Jev only returns probabilities, the router is what turns them into actions Claude can run step 5 → test the full chain end to end, not just the Jev endpoint: .venv/bin/python -m src.cli '{"goal":"what is 2+2?","kind":"chat"}' the JSON you get back should have action, reason, mode, jev_used and confidence step 6 → start in mode: shadow. Claude works like before while every Jev call is logged next to what Claude actually did. after 20-50 real decisions keep only the question packs that matched step 7 → flip to mode: active with hard gates: 0.80+ acts on its own, 0.50-0.79 only suggests, under 0.50 comes back to you what changed for me: Claude stopped wasting tokens deciding whether to retry, reuse the cache or spin up a subagent. Jev makes those calls, Claude does the actual work, and anything it isn't sure about lands on my desk instead of in my outbox grab the exact stack from the repo, then read how every gate works in the full Jev architecture breakdown ↓
Guidex.com
Asteri’s setup hands the small calls an agent makes, such as “retry?” or “enough sources?”, to Jev and not to a frontier model. The post gives about $0.42 for 10,000 decisions and says it runs on your machine.
Phil Dressler
@phil_dressler
I put AI agents in a GTA-style fighter jet competition… Astra built it. Jev powers their brains.
XGames and real time
PickValvet Online
@VALVETONLINE
I RAN A DECISION MODEL ON MY LAPTOP TODAY 1. Kev: tiny Jev-style models built on Qwen3.5, 0.8B up to 9B 2. 4B/9B fit a 32GB Mac, also CUDA and ROCm 3. Answered a support ticket in 495ms with probabilities #OpenSource #LocalAI #ML
XOpen source
WOLF
@FXWOLF2
Jevに渡すデータを変えてバックテストしてたんだが、時刻情報を渡さんほうが成績いい。Jevにとってはノイズなんか。テクニカルも削って1つか2つしか渡さんのが良さげ。あと、直前のトレードの勝敗渡したら良くなるかなって思ったけど変わらんかった。とりあえず、最初にもらえる$5を使い切るまでは遊んでみる。
XTrading and markets
Pick
shawn
@shawnbuilds
Claude Mods are like custom Minecraft servers Claude Code Here's how to use Claude Code Mods + Jev to build your own custom memory harness for Claude Code. It runs in milliseconds, at sub-penny cost compared to subagents ⬇️ x.com/i/article/2106…
Guidex.com
shawn’s step-by-step guide: Claude Code Mods plus Jev make a custom memory harness for Claude Code. He says it runs in milliseconds at sub-penny cost compared to subagents.
GeethanTech
@GeethanTech
Jev returns bounded choices, scores and probabilities instead of prose. That limits out-of-schema output, not incorrect decisions. TypeSafe’s speed and cost claims still need independent testing. geethantech.com/posts/jev-type…
XSocial feeds
CRYPTOFANZ💜💎
@cryptofanz12
𝗝𝗲𝘃 𝗜𝘀 𝗧𝘂𝗿𝗻𝗶𝗻𝗴 𝗔𝗜 𝗜𝗻𝘁𝗼 𝗔 𝗦𝘁𝗿𝘂𝗰𝘁𝘂𝗿𝗲𝗱 𝗗𝗲𝗰𝗶𝘀𝗶𝗼𝗻 𝗟𝗮𝘆𝗲𝗿 ⚡ As the first System One model launched by @typesafeai, Jev is designed for software that needs AI to make fast, structured decisions—not generate paragraphs of text. Traditional workflow: Prompt → Text → Parsing → Validation → Application Logic Jev takes a more direct route: Application State → Typed Question → Typed Decision No JSON prompting. No complex output parsing. Just typed decisions that applications can use directly, along with probability and confidence. Jev supports three decision patterns: 🔹 Choice — Select from predefined options 🔹 Score — Evaluate using a defined scoring framework 🔹 Noul — Handle structured decision problems built around application logic Speed is another key feature, with response times designed around roughly 70–500ms. Its pricing is also aimed at high-frequency inference: 💰 $0.042 per million input tokens 🆓 Output tokens free Potential use cases include: 🎫 Ticket routing 🛡️ Content moderation 📊 Risk scoring 🤖 Agent branching and workflow decisions The bigger idea is simple: AI doesn't always need to write something for a human to read. Sometimes, software just needs a fast, reliable decision. That makes models like Jev an interesting direction for AI agents, automation, and real-time application infrastructure. Available through the http://B.AI API as: Jev-1.13.0 Jev-Latest 🔗 http://chat.b.ai/chat @justinsuntron @BAI_AGI #TRONEcoStar #AI #Agents #B_AI
XBenchmarks and evals
ABNewswire
@ABNewswire
Jev Brings Fast, Structured Decision-Making to AI Workflows dlvr.it/TVcnJg #ComputersSoftware #Technology
XBenchmarks and evals
Ethan Walker
@ethan_walker_ai
🧵 What if the next big AI model isn’t designed to chat? TypeSafe AI is pushing a different direction with Jev, a model built to make structured decisions for software. No essays. No long answers. Just decisions that software can act on. Here’s why this matters 👇
Guidex.com
Ethan Walker’s explainer thread: Jev is built to make structured decisions for software. No essays and no long answers, only decisions that software can act on.
Lilys.ai
@LilysAI_
@tetumemo 要約ノートができました👉 lilys.ai/digest/1147040… - Jevは次の行動を決めるためのAIエージェント用「脳」。 - 文章生成ではなく、選択・数値・はい/いいえの判断に特化。 - うまく設計すれば、品質を落とさずコスト削減が狙える。
XBenchmarks and evals
echild
@eboppu
some more tests. jev for tool filtration is really good.
XBenchmarks and evals
Allie the Icon
@allietheicon
One of my favorite categories of Jev use-cases is real time speech! Teleprompters, speech coaches, and so much more
XTools and apps
Guidevercel.com
Vercel’s six-minute guide. Ask two narrow questions about one diff: which review track fits the change, and does it require existing callers to migrate. Application code collects the evidence and uses the answers to organise review. The method carries over to any decision model.
Dorian Smiley
@dsmiley411
I finally managed to burn through my free usage credits with Jev, all $5 of them. 123M tokens. Man this thing is cheap!
Tatsuya Shirakawa
@s_tat1204
jevや派生を使ったアプリケーションも、あまりconfidenceを利用していなさそうなことを考えると、識別ができてしまえばなんでも良く、この手のembeddingベースの方法でも十分なケースは多そうですね。
XTools and apps