About Jev Guide

Jev Guide (jevguide.top) is an independent tutorial website about Jev, the System One judgment model released by TypeSafe AI in September 2026. Jev is purpose-built for judgment, choice and scoring questions — it returns typed answers with confidence scores instead of free-text chat.

What is on this site

The site is bilingual (English and 简体中文), and the interactive demo on the homepage runs entirely in your browser using preset example data ("example fixtures") — no network request is made.

• Guides — hands-on tutorials, from your first API call to picking the right question type.
• Scenarios — where a judgment model fits in real pipelines (moderation, routing, scoring gates).
• Case studies — complete, reproducible request/response examples with full code.
• Version tracking — what changed in each Jev release and how to migrate.
• Glossary — plain-language definitions of the terms used across the site.

Editorial stance

We write for developers who want to evaluate and integrate Jev, so we favor runnable examples over marketing language, and we flag clearly when something is an example fixture rather than a live API response. Model behavior, API fields and availability change; always confirm against the official documentation before relying on anything shown here.

All responses shown on this site are preset example fixtures that illustrate the shape of the output; they are not live calls made on your behalf.

Independence

Jev Guide is a third-party, independent tutorial site. It is not affiliated with, endorsed by, or sponsored by TypeSafe AI or OpenRouter, and it is not an official documentation site. Trademarks and product names belong to their respective owners and are used here for identification and reference only.

Contact

Feedback, corrections and suggestions are welcome at hello@jevguide.top.