@typesafeai

An AI lab building intelligence beyond chat.

Joined January 2026
Ladies and gentlemen, agents and assistants, we are psyched to announce Jev is back. Capacity has increased and signups are open!
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Get started with Jev at console.typesafe.ai Note that new signups no longer get free credits; we hope to bring these back as soon as possible.
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Yesterday @coderabbitai didn't just host a hackathon, it was a Jevathon! Tired of having to think like a robot? Our favorite hacker review was: "Think like a programmer again" with @allietheicon
1/ Yesterday we hosted @typesafeai at our @coderabbitai HQ for Jev's first ever hackathon! 160+ builders. ~4hrs of hacking. Expert judges, Incredible energy. I also got to sit down with @allietheicon and talk about what Jev means for Coding, Software Development and the new paradigm shift you have to adapt when working with this new class of AI models. She shared some really helpful tips and examples of how to best work with Jev - I'll try my best to summarize some of them in this thread⬇️
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TypeSafe AI retweeted
This is my favorite kind of energy with Jev right now. I very much understand @theo's concern about people thinking Jev should be used for more things than it's actually suited for, but I also strongly believe that not everything we build needs to be suitable for commercial purpose. I love that Jev is sparking so many creative explorations. This is the energy that leads to both delightful experiences and surprise breakthroughs!
I get the point but I will say that a side effect of delivering LLMs and a model like Jev is that they enable creative explorations, building for the joy of building, without even thinking of commercial utility. Some people play guitar and compose, some might use jev to create generative art, and others might build recurrent state based controllers. It serves as reps, and enjoyable practice at a craft that used to require a lot more time and effort before getting feedback signals. I fucking love it man.
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TypeSafe AI retweeted
Martin Casado on why the labs missed Jev: they're building beings that speak, and software needed a model that chooses. "LLMs were text in, text out. They generate text, and they came from chat... We've spent the last few years trying to take this thing that spits out text and cram it into a traditional program... It's just been super janky." "Jev basically said, 'Generating text as output is very expensive, but it's also more complicated than you need... If you give us a set of options, we'll choose the best option. We can do that incredibly fast, incredibly cheaply, but also with much more accuracy because we can train just for this.'" "This has probably been the fastest adoption of an AI model since ChatGPT. It's been remarkable because we were all primed for this." "[The labs] are trying to create beings, and beings speak. If you're trying to create God, God speaks in natural languages. This is really about something that's for traditional software." @martin_casado
Box CEO Aaron Levie, Steven Sinofsky, and Martin Casado join Erik Torenberg to discuss "We Must Pace the Frontier," the upcoming AI election in 2028, and Jev: They argue that most of today's AI regulation debate is happening before anyone has defined the risks being regulated. Every prior wave, from computer viruses to aviation, built its safety standards after learning how the technology actually failed. Then it gets concrete. Agents don't get tired, run at enormous scale, and probe systems in ways employees never could, which may mean rethinking permissions, authentication, and the security stack itself. They close on why AI innovation may increasingly happen outside the frontier labs, in the software built around the models. 00:50 "We Must Pace the Frontier" 03:50 Do the labs believe their own x-risk talk? 06:49 If it's existential, nationalize it 11:32 "You're asking us to regulate you?" 12:08 2028 as the AI election 18:50 Tech never learned to navigate regulation 25:50 The law that came from one 1983 hack 28:39 Noam Brown's heat exfiltration idea 32:30 Cold War covert channel stories 34:35 Agent swarms look like a DoS attack 41:25 Sinofsky's fear: GDPR for AI 46:20 No jets if the FAA started in 1910 48:38 Jev: decision engines vs. chatbots 53:01 Labs build beings, software needs tools YouTube: youtu.be/TLJNJDf2XGo @levie @stevesi @martin_casado @eriktorenberg
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TypeSafe AI retweeted
We couldn't do what we do @typesafeai without our partners at @modal 🙏 thanks Modal team!
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SO MUCH THIS I believe that one of jev's greatest benefits to automation will come from resurrecting architecture best practices: state management, encapsulation, abstraction !!!! and combining them with ML's best practices: measure/evaluate, use calibration/uncertainty (adding screenshot b/c I don't know how to quote 2 posts 🤦)
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TypeSafe AI retweeted
remember this old post of mine? Tried it with Jev---it seems to have a grasp of the globe on par with some of the best models a year ago due to the architecture & low cost, it was also feasible to extract a labeled map of continents and countries. lots of interesting details
new post. there's a lot in it. i suggest you check it out
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TypeSafe AI retweeted
Replying to @dotpem
@dotpem installing this as a plugin to our on-call pager
another 26.7M views for the alarmy app this is 🔥
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You've never routed like this before. @OpenRouter is bringing Jev to all of your LLM calls, so your agentic workflows never have to waste a token again. As always, faster, cheaper, more intelligent. Go build the future.
Introducing typesafe/jev-router: a cache-aware model router powered by Jev and @typesafeai The Jev Router picks the best model and reasoning effort for each request, balancing quality, speed, and cost. Here's how it works 👇🏻
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Replying to @kieranklaassen
some of our biggest prod successes are in this regime - tune-able RAG
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DSPy methodology 🤝 System One Program, don't prompt!
DSPy 3.4.0 was just released! This release includes native support for Jev and System one models inside of DSPy! Use it with compatible signatures. This release also includes a brand new optimizer, ReAnchor, specifically for calibrating outputs with confidence.
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Serious Jevelopments happening inside our Discord, under the watchful eye of @allietheicon 👀
It's been a wild first week in the TypeSafe Jevelopers Discord
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Speed was measured while shadowing live production traffic: up to 4× faster. Offline tests: 2 to 3×.
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Jev generally out-performed frontier LLMs at a fraction of the price: Repeat-question matching: 70% → 97% Expense categorization: 50% → 86% (vs human reviewers) Escalation: same catches, fewer false alarms
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Observe the art of the @deel. And they came with receipts 💅 Keep reading to find out how it's done.
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Some great use cases they measured: • Matching repeat analytics questions to approved answers • Picking 1 of 36 metrics • Blocking PII requests • Deciding when a support chat needs a human • Tagging tickets across a 3-level taxonomy • Sorting expenses into about 55 categories Every one is a pick from a known set.
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TypeSafe AI retweeted
Jev is having a moment. Every platform rushed to host it the same way: another model endpoint in the catalog, and good luck wiring it into your agent loop yourself. We took a different route at DigitalOcean. In addition to Jev being available in our Inference engine, Jev is also available inside Action Gateway as a first-class classifier tool, right next to browser automation, and 16,000+ other tools behind one governed MCP endpoint. That distinction sounds small. It isn't. Treat Jev as a model and your agent's LLM has to know about a second inference provider, manage another API key, and hand-roll the request plumbing. Treat it as a tool and any harness you already run (Codex, Claude Code, LangGraph) just discovers it and calls it, same as any other tool in the belt. Ask typed questions: a yes/no, a choice from your own list, a score on your own scale. Get back decisions with calibrated probabilities, schema conformance guaranteed. Answers land as data your code uses directly, so agents route, filter, and escalate without parsing prose. The gateway part matters too. Jev calls ride the same governance as everything else: scoped permissions, credentials that never enter the model context, low-confidence answers flagged for a human, every decision in the audit trail. We ran a Codex agent through it this week. One YAML, one prompt, and it turned a day of X noise into a shortlist worth reading, with the uncertainty left visible. If you want raw inference, Jev is on Serverless Inference too, at $42 per billion input tokens with output free. But agents shouldn't have to treat a classifier like a chatbot. Models reason. Jev decides. Ship both. On the same platform.
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On Sept 30 we’re working with @supabase to put on HYPERSHIP DAY on Product Hunt. If you think you can build and ship fast, and you haven’t launched recently, submit your launch by midnight Sept 30. We’ll be providing some cool prizes including Jev credits and swag! And if you’re not launching: Mark your calendars to try new products, make feature requests, and watch the products evolve over the course of the day. 🔥🔥
Sep 30 is **HYPERSHIP** day on Product Hunt. If you think you can build and ship fast, and you haven't launched recently, submit your launch by midnight Sep 30. Be prepared to build and ship multiple features in real-time. Appropriately, given the speed theme, we’ve partnered with @typesafeai, makers of Jev, a frontier model at real-time speed, and @supabase, the backend platform you know and love! Prizes will include Jev and Supabase credits, swag boxes, and secret prizes we’ll announce later. And if you're not launching: Mark your calendars to try new products, make feature requests, and watch the products evolve over the course of the day. This is the day where we redefine what shipping velocity means.
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