Jev by @typesafeai is now on OpenRouter, in beta. Jev is a System One model. Instead of generating text, it takes your app's state plus a typed question and returns a typed decision with a probability attached. There is no JSON prompting, parsing layer, and nothing to validate Show more
TypeSafe AI on X
Official X account for TypeSafe AI product and research updates, including the opening of Jev access and a note on signups being temporarily paused.
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- 2026-09-22
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Highlights
- Pinned September 20 post announces Jev is available to everyone with no waitlist.
- Profile shows 55 posts and 135.3K followers, joined January 2026.
- A later post says signups are temporarily paused to protect quality of service while existing accounts keep working.
- Feed includes third-party posts like MotherDuck's prompt_jev() SQL integration, quoted by the account.
Watch out
Logged-out visitors see only the public profile and a few posts, so this is a snapshot rather than the full timeline.
More like this
Official LinkedIn page for TypeSafe AI with company details, launch announcements, and hiring posts, including the $40 million seed round led by DCVC.
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Official
Official TypeSafe community Discord for support and discussion, including a Show and Tell channel where builders share demos built with Jev.
Sites & GuidesDocs#official#community#demos
Official
An observation on where launch-week discussion landed: only three Jev posts on Reddit while X filled up with demos, threads, and measured runs.
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Community
From the community
Posts from builders shipping with Jev right now.
Jev lands on OpenRouter
700 leads scored for $0.09
JEV is INSANE. We gave it 700 high-intent leads and personalised outreach messages. In 40 seconds, it predicted how each message would perform, assigned a confidence score and detected lead-message mismatches. All for just $0.09. JEV can also score leads, analyse buying Show more
Beating Gemini Flash Lite on an eval
Ran @typesafeai's Jev against an existing classifier eval that previously used Gemini 2.5 Flash Lite. It won both on quality (saturated the eval) and speed (6x)
Browser Use Ultrafast, powered by Jev
Breaking: Browser Use + Jev = Ultrafast ⚡ Findings flights took 7s and cost only $0.0039 🤯 > new action space every step > DOM state space > small LLM fallback to type (this video is at 1x speed btw) Built a tiny open source browser agent. try it below ↓
A really smart switch statement
hype-free explanation of jev: jev does not replace gpt / claude jev is just a *really* smart switch statement like if 2016 ml classifiers got 2026 levels of intelligence it's a new* type of tool that will make a lot of workloads insanely fast, cheap, and accurate * = and by Show more
@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
When a designer gets Jev
when a designer gets access to Jev