Live demo · Jev by Typesafe

Watch Jev out-run an LLM, live

Two runners race through the same maze. Each step, a model looks at the board and picks a direction. On the left, Jev decides in about 100ms. On the right, a normal LLM makes the same decision, but takes over a second each move. Same task. Watch what happens.

Jevdecision modelready
0moves
ms / move
0.0selapsed
LLMgptready
0moves
ms / move
0.0selapsed
The LLM side is capped at a few moves so it stays cheap. Each move is a real API call to both.
Why it wins: it knows when it's unsure
Jev doesn't just decide fast. Its confidence is honest, so you can trust it. Try a review, clear or genuinely mixed.
Jev
confidence
LLM
confidence
And the confidence is calibrated
Score a labeled set, half clear reviews, half deliberately mixed. Jev is never told which. Its average confidence drops on the mixed ones by itself.
Clear reviews
Mixed reviews

From the writeup Jev: The AI That Returns a Decision, Not a Paragraph. Jev is by Typesafe. Both models run live; keys stay on the server.