# Jev for beginners: how to use it and what to build

DevFeed: [Jev for beginners: how to use it and what to build](<https://devfeed.tech/articles/jev-for-beginners-how-to-use-it-and-what-to-build-61303.md>)

Original publisher: [Read original article](<https://www.lennysnewsletter.com/p/jev-for-beginners-how-to-use-it-and>)

Author: Claire Vo

Published: 2026-09-28T12:03:04Z

Content type: tutorial

Language: en

Sources: [Lenny's Newsletter](<https://devfeed.tech/sources/lenny-s-newsletter.md>)

Topics: [CI/CD](<https://devfeed.tech/topics/cicd.md>), [llm-reasoning](<https://devfeed.tech/topics/llm-reasoning.md>), [AI Context Management](<https://devfeed.tech/topics/ai-context-management.md>)

Tags: [ai](<https://devfeed.tech/tags/ai.md>), [claude-code](<https://devfeed.tech/tags/claude-code.md>), [code](<https://devfeed.tech/tags/code.md>), [codex](<https://devfeed.tech/tags/codex.md>), [product](<https://devfeed.tech/tags/product.md>)

## AI overview

A podcast episode introduces Jev, TypeSafe AI's model for returning structured values such as choices, scores, and probabilities. It demonstrates applications including pull request categorization, analysis of Claude and Codex sessions, Gmail triage, product insight classification, and a YouTube comment dashboard, with discussion of pairing Jev with other models and its pricing.

## Source excerpt

Watch now (26 mins) | 🎙 Jev returns type-safe structured values instead of text, which makes it the fastest, cheapest classification layer I've ever put in a pipeline--and this week I shipped three real projects with it