Claire Vo · 2 min read · Gen AI Tools
Jev for beginners: how to use it and what to build
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This episode explores Jev, TypeSafe AI's new decision model that returns type-safe structured values (choices, scores, probabilities) instead of generated text at extremely low cost—4 cents per million input tokens with no output charge. Host Claire Vo shares five real-world applications she built using Jev, from PR categorization to a YouTube audience dashboard, demonstrating its practical utility and unique pricing model. The episode covers both technical implementation details and the strategic implications of ultra-cheap classification at scale.
Key Takeaways
- Jev returns structured, type-safe outputs (choices, scores, probabilities) rather than free-form text, making it fundamentally different from traditional LLMs and ideal for classification and decision tasks
- The pricing model—4 cents per million input tokens with no output charge—enables use cases previously impractical at scale, such as analyzing 1,700 PRs for just 9 cents or running 200,000 classifications for ChatPRD's insights graph
- Jev works best when paired with a traditional LLM, using Jev for fast/cheap classification and a generative model for richer follow-up tasks like Gmail triage
- Real-world applications include PR categorization, personal productivity meta-analysis of Claude/Codex sessions, Gmail triage scoring, and turning 4,500 YouTube comments into a searchable audience dashboard
- Jev's speed and cost structure open the door to real-time applications, as demonstrated by a voice-to-color emotion-mapping app built in an afternoon
Excerpt
Jev is TypeSafe AI’s new decision model. It returns type-safe structured values (a choice, a score, a probability) instead of generated text, at 4 cents per million input tokens with no output charge. This week I ran it on five real projects: PR categorization, a meta-analysis of my own Claude and Codex sessions, Gmail triage, the ChatPRD product insights graph, and a live audience dashboard built from 4,500 YouTube comments. Listen or watch on YouTube , Spotify , or Apple Podcasts What you’ll learn: What makes Jev fundamentally different from every other model I’ve used How I analyzed 1,700 PRs…