Writing and improving Jev programs

Jev is a judgment model. It reads one state, answers every question in the request independently and in parallel, and returns a probability distribution over the answers you defined. It does not reason in steps and it does not generate text. Code owns the control flow, the arithmetic, and the policy. Jev owns the snap judgments.

A good Jev question is one a knowledgeable person answers in a second, given the right context. "Does this message convey urgency?" fits. "Analyze this message and decide what to do" does not fit. Break that task into small questions and compose the answers in code.

Models

This guidance applies to jev-1.14 and jev-1.13. The two models share the same price and context limits.

Name	Points to	Use it when
`jev-latest`	`jev-1.14.0`	You want the newest stable release. The SDKs use it by default.
`jev-preview`	`jev-1.14.0`	You want to try a preview build. It moves ahead of `jev-latest` when one exists.
`jev-1.14.0`, `jev-1.13.0`	itself	You have tuned thresholds and want answers that do not change.