Tests Jev Character Classification

Stuart Sim reports a first quick test of Jev through the Vercel gateway. The evaluation asks whether the character “2” is a number or a letter, and the source says input validation passed.

View on X

Stuart Sim@StuSim𝕏

First quick test of Jev from @typesafeai Install via @vercel gateway Sending evaluation (input validation passed): { "model": "typesafe-ai/jev", "state": { "character": "2" }, "questions": { "kind": { "type": "choice", "instructions": "Is the character a number or a letter?", "criteria": { "number": "The character is a single numeric digit from 0 through 9.", "letter": "The character is an upperca

Sep 17, 2026X postsView on X

The request uses the model `typesafe-ai/jev` and supplies `2` as the character. It presents the question as a choice with criteria for “number” and “letter.”

Also filed under Tools & apps

TypeSafe Jev Decision-Model Client
It provides a shared TypeSafe Jev decision-model client for the dsh ecosystem, with strict response validation, keychain-first key resolution, and typed fail-open errors. It is Jev-optional by design.
Jev Reviews Changed Code
The Claude Code plugin uses Jev (TypeSafe AI) to assess changed code at the end of a turn and, when needed, propose a code review using Open Code Review rules.
Alerts on Company Data-Use Changes
TOS Watch sends an email when a company changes what it does with your data. It combines Open Terms Archive history, a Jev classifier, a static site, and a Cloudflare Worker.
OpenAI API-to-Jev Gateway
jev-gateway turns any OpenAI API backend into a gateway compatible with Jev.