Pawel Huryn · 6 min read · AI & Product
A New Kind of AI Model: Jev and Quick Wins for PMs
Read the original on productcompass.pm →
Jev is a new decision-making AI model from TypeSafe AI that returns structured outputs (yes/no, choices, or scores with probabilities) rather than generating text. Unlike traditional LLMs, it charges only for input tokens at extremely low cost ($0.042/million tokens) and can process multiple questions simultaneously. The author tested Jev for document classification and implemented it in a live Q&A moderation tool, finding it both cost-effective and accurate.
Key Takeaways
- Jev is a decision model, not a generative model—it returns structured outputs like binary decisions, multi-choice selections, or scored ratings with associated probabilities.
- Its pricing model (output tokens are free, input at $0.042/million tokens) makes AI moderation viable even on free-tier products, with 1,000 questions costing roughly $0.02/day.
- Multiple questions can be processed in parallel with no added latency—32 questions took nearly the same time (566ms) as a single question (603ms).
- Prompt engineering is critical: explicitly writing rules into the prompt dramatically improved accuracy (24/24 correct vs. 5/24 without rules), and instructions should prevent prompt injection by treating user input as data, not commands.
- Jev cannot be fine-tuned, but this is a minor limitation since policy changes only require updating the prompt text, making it flexible for dynamic use cases.
Excerpt
Hey, Paweł here. Welcome to the Product Compass Newsletter. It’s the #1 most hands-on AI PM newsletter. Every week I share actionable tips, templates, and step-by-step guides for PMs. Here’s what you might have missed: AI Prototyping in 2026: The PM Field Guide The Ultimate AI PM Learning Roadmap 2026 What Is Product Discovery? The Ultimate Guide for PMs (2026 Edition) How to Create an AI Product Strategy: The AI Strategic Lens Framework Building In Public: How to Get Your First 100/1,000/10,000 Users Consider subscribing and updating your account for the full experience: Subscribe now Recently, I tested a new…