Found this little time capsule from my previous life in fashion and beauty.
Santa Monica, many years ago, shooting with @AnneV.
I’m somewhere in the background, with long hair :)
Jev, explained for executives: what it actually means for your business
I wanted to write this for founders, executives and operators trying to understand where Jev fits into their business. Not a technical breakdown. Just what it does, where it helps and what we’re seeing in our own tests.
Last week, TypeSafe AI launched Jev, and it’s been getting a lot of attention. The company is led by Diogo Almeida, a former OpenAI researcher credited as one of the inventors behind ChatGPT, has $40M in funding, and got a TechCrunch headline about “thrilling developers.”
The claim is that this is a new class of AI model, not just another model. In the demo, Jev made a decision in 0.1 seconds that took GPT-5.6 8.5 seconds, at roughly 1/50th of the cost.
Those are big numbers. But what does that actually mean in practice?
1. What it is
Jev is not a chatbot. It doesn’t write emails, summarize documents or brainstorm with you.
It makes fast, structured decisions. You give it context and criteria you’ve defined beforehand, and it returns a yes/no or a choice from a list, with a probability attached.
“Does this customer want a human?” → 92% yes.
“Is this task actually complete?” → 31% yes.
“Which of these 5 workflows should run?” → Workflow 3, 87%.
A useful way to think about it is Kahneman’s System 1: fast, automatic responses. In that analogy, LLMs play the slower, more deliberate System 2 role.
It’s a simplified comparison, but it helps explain where each one fits.
2. Why it matters
For a business, the appeal comes down to three things.
Speed. Responses take tens to hundreds of milliseconds rather than seconds. When you have agents making decisions at every step of a task, that adds up quickly.
Cost. The pricing is a small fraction of even the cheapest LLMs. For decisions you’re making thousands or millions of times, that can change the economics.
Calibration. This is the less obvious one, but it matters. Jev is trained so that its probabilities reflect how often it’s right. The goal is that, across decisions where it gives a 60% probability, it’s right about 60% of the time.
That gives you a more useful basis for deciding when to let the model act and when to involve a human.
Also, it can only choose from the options you give it. It can still choose the wrong answer, but it can’t invent a new one outside that list.
3. What it is not
This doesn’t mean Jev can replace an LLM.
It isn’t built to work through open-ended problems or reason through unfamiliar situations in the same way. Every possible answer needs to be defined beforehand.
That limits what you can use it for. But for a lot of business tasks, a fixed set of answers is exactly what you need.
4. Where it gets interesting
A lot of what companies use LLMs for today is simply choosing what happens next.
Route this ticket. Pick this agent. Escalate or not. Approve or flag. Check whether the task is done. Decide where to click.
We’re paying LLM prices, and waiting for LLM responses, for many decisions that may not need a generative model at all.
With models like Jev, you can move some of those decisions to something faster, cheaper and better calibrated, while keeping the LLM for the parts that actually need reasoning or language.
You don’t have to replace the whole workflow to get value from it.
5. What we’re doing at TESS
We’ve been testing it. In our early internal tests, it was roughly 10× faster at one-third the cost of GPT, and it got every case we ran right.
It was a small sample, not a production benchmark. I wouldn’t read that as “100% accuracy.” But it was enough for us to take it seriously and keep going.
If those results hold up, we could move many of our background LLM calls to this type of model: agent routing, task routing, escalation and checking whether an agent actually finished the job.
For customers, that could mean better decisions, fewer half-finished tasks and lower costs.
The use case I’m most interested in is browser use. It’s one of the biggest token burners in agentic AI, and a lot of those calls involve deciding what to do next on a page. If we can move some of those navigation decisions to a model like this, browsing could become much faster and cheaper.
The takeaway
Not every step in an AI workflow needs an LLM. Sometimes you just need a reliable decision, quickly.
That idea isn’t new. What’s interesting about Jev is whether it makes this approach practical and cheap enough to use at scale.
From what we’ve tested so far, it’s worth paying attention to.
Why are traditional industries adopting AI agents faster than tech sectors?
In this clip, @tess_us Co-founder CGO Milena Maia breaks down the main obstacle to AI adoption in enterprises, based on insights from founder & CEO Ricardo Barros for the State of AI report by HI Ventures.
Discover why successful AI deployments start bottom-up, not through rigid IT rollouts.
Harnesses often get dismissed as just scaffolding, just prompt engineering, and not real research. But that couldn't be farther from the truth. The same model weights that score 30% on ARC-AGI score 95% with a better harness.
So we gathered a group of researchers and founders working at the frontier to do a deep dive into the state of harnesses.
We cover how we got to this point, the case for making your harness as expressive as possible, and what YC learned building an agent for every employee in the company.
00:00 - @FrancoisChauba1: Why harnesses matter
04:27 - Building an auto-researcher by accident
07:13 - A five minute history of harnesses
13:56 - Self-improving harnesses
18:35 - @sethkarten: Prime Agent, a self-improving RLM harness
21:50 - Context as an L1, L2, L3 cache
24:51 - From Turing machine to von Neumann computer
28:33 - Messaging between agents
30:04 - ARC-AGI results
33:09 - Emulator Bench and GPU kernels
37:30 - @JonSaadFalcon: OpenJarvis, personal AI on personal devices
38:26 - How far behind are local models
39:21 - The five primitives of a personal AI stack
42:47 - Letting cloud models optimize your local stack
43:53 - 800x cheaper than the cloud
45:58 - @josh__france and @jbellregan: QM, YC's agent harness for work
47:29 - A history of YC's internal agents
49:24 - OpenClaw and a fleet of 50 agents
51:04 - Pulling the brain out of the sandbox
54:43 - Letting the agent choose its own sandbox and model
57:16 - The grind tool: budgets on goals
58:50 - Agents don't understand social context
Most AI agents die in the IT backlog.
The person who understands the process best usually sits in finance, in operations, in support.
They can describe exactly what the agent should do. Then they open a ticket, and wait.
Our founder & CEO, @souorica, shows you how Tess solve this, turning AI implementation into real business results.
Jean Marc, fundador de Konko AI, se une a Federico Antoni y Jimena Pardo para hablar sobre construir en la intersección entre la inteligencia artificial y la salud en Latinoamérica.
Hablamos de:
-Por qué el mayor reto de la salud es una oferta limitada frente a una demanda ilimitada.
-Cómo la AI puede multiplicar la capacidad de médicos y clínicas.
-Por qué el contexto del paciente y la interoperabilidad son fundamentales para el futuro de la salud.
-Cómo construir una empresa implica tomar riesgos, fallar y aprender en el camino.
Una conversación sobre AI, salud, emprendimiento y por qué nunca había habido un mejor momento para construir.
AI can close Latin America’s productivity gap
Automation presents a massive expansion opportunity for Brazil, Chile, Mexico, and Argentina — the room to grow is exactly where AI can make the biggest difference.
Explore this and more in the 2026 State of AI Latin America. Full report in the comments.
State of AI Latin America disponível agora em português
Há algumas semanas lançamos a 4ª edição deste relatório, no qual falamos sobre o Agentic Big Bang que vimos em novembro, quando a IA deixou de apenas responder perguntas e começou a agir.
Hoje começamos a ver como os agentes de IA estão transformando as organizações.
Elaborado com os conhecimentos e perspectivas de mais de 420 founders, operadores, investidores e executivos, este é o nosso relatório mais completo até o momento.
O relatório está nos comentários.
Em colaboração com @ElevenLabs & @tess_us.
@facesdotapp , @tess_us, @lavca_org , Antonia Bezanilla, Alejandro Cercio Peña, Leonardo Coz, @ignaciosoffia , @cacoos, Sasha Glatt, Alexi Andrade, @federicoantoni e @pimepardo.