Free Lesson
Jev in One Call
30 min
Oct 21, 2026 2:00 PM
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What you'll learn
Understand Choice, Score, and Noul
Write questions against a JSON state, with backtick field references that keep instructions unambiguous.
Run questions in parallel
Fan out a dozen questions in one round trip and read the latency and cost lines that come back with every call.
Understand when it fails
Spot the four failure modes before they reach production: literal reading, arithmetic, context rot, and injected text.
Why this topic matters
Jev landed on OpenRouter on Sept 18. It's a new kind of model. It takes a JSON state and typed questions and returns probabilities for all of them in one parallel pass, at $0.042 per million input tokens with output free. In 30 minutes you will see the three primitives on a live support ticket: Choice picks the team, Score sets the urgency, Noul answers if the customer wants a refund. And the notebook is yours.
