Jev 101jev.page
Official siteStart the 101
Hub101DemosUpdatesTalksSocialWhat's the difference?01 · What is Jev?02 · How it works03 · Questions04 · Use cases05 · Confidence06 · Recipes07 · Limits08 · Model card09 · First call10 · FAQ

What's the difference?

If you know ChatGPTvs ChatGPTWhen to use whichDemo stagesUpdatesEcosystemTalks & appearancesSocial postsReadingsOther 101sWhat's the difference?ResourcesAbout this guideStart the 101TypeSafe console ↗

All stages · Demo 410

Portuguese NISS

Choice niss / vat / other. Eleven digits; primes 29–2, 9−(sum%9). Jev never mods 9. Ten digits need 11. Distinct from NIF.

ChoiceNISS 29-23 in JS

A digit tape. 12345678903 books a Segurança Social plate. A last-digit flip rejects. Ten digits never pass.

replaykind —niss —

STANDBY

All 4056 stages

Educational stage on jev.page — not the official TypeSafe console. Live calls go to POST https://api.typesafe.ai/v1/systemone from your browser when you paste a key. Without a key, the stage plays a recorded decision shaped like jev-1.13.0. Jev does not write the UI copy.