Jev by @typesafeai is now on OpenRouter, in beta.
Shipped Jev on OpenRouter in beta, letting apps send state plus a typed question and receive a typed decision with a probability instead of parsed JSON.
The original post
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 against.
From the same thread
- @jjacky — congrats @typesafeai made something special for y'all
Engagement when collected
Numbers are a snapshot taken from X when the case was added to the library (schema v1, collected 2026-09-19); they will not match today.
Where this case fits
Filed under general Jev builds. In the pattern Jev is built for, the model answers a bounded question per step — and ordinary code acts on the answer, because the answer is already a value rather than a paragraph. Browse the full case library for the work it sits next to.
Related Jev cases
Keep browsing: all 1173 Jev cases · more from @OpenRouter · builders · what Jev is
Last updated: 2026-09-22 · sources & corrections · every card links to its author's original post