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Jev glossary

PrimitivesChoice question

Choice

Pick one option from a set you define; returns the selected option, a probability for every option, and confidence.
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Category
Primitives
Also known as
Choice question
Reading time
1 min
Related terms
6
Directory entries
8
Docs
docs.typesafe.ai
Added
2026-09-24

Definition

A Choice question takes a map of options to rubric descriptions and returns the highest-probability option, the full probability distribution, and a 0-1 confidence. A Choice can hold up to 255 options, so large candidate sets need pre-filtering or multiple passes.

Option names and descriptions are both sent to the model; use null when a name speaks for itself. Choice fits answers that are one of a known set with no order between them (routing a ticket, classifying a document, detecting a language), and an explicit other or none-of-the-above option is recommended when the list might not cover every input.

Tagsprimitivesclassification

Related terms

Definitions that connect to this one.

ScoreRate the state against 2 to 10 ordered levels; returns a probability-weighted position, per-level probabilities, and confidence.PrimitivesNoulThe yes/no primitive: one probability from 0 to 1, where the value is the answer and no separate confidence is returned.PrimitivesChoice optionOne key in a Choice criteria map, with a description that can be a string, a structured object, or null.PrimitivesCriteriaThe possible answers for a question: a map of options for Choice, an ordered list of levels for Score, or true/false for Noul.PrimitivesProbability distributionThe floats summing to 1 across your options or levels that every Choice and Score answer returns under probabilities.Answers & ConfidencePrimitive limitsThe hard caps to design around: 255 Choice options, 2 to 10 Score levels, and a 64k context covering state plus questions.Primitives

From the Jev directory

Directory entries that go deeper on this term.

Choice
Pick one option from a set you define. Returns the option, the full probability distribution, and 0-1 confidence, with up to 255 options and parallel questions that barely add latency.
Jev Practices & PatternsDocs#official#primitives#choice
Official
Primitives: Choice, Score & Noul
The three TypeSafe question types, the typed answers they return, how to choose between them, and how to ask several in a single call.
Jev Practices & PatternsDocs#official#primitives#choice
Official
JEV ARCADE
Two browser games against a live Jev opponent: a first-person quick-scope arena and a neon survival challenge, where Jev picks tactics and authored code handles movement and physics.
Jev CookbooksPlayground#community#playground#games
Community
Jev Plays
Four board games against Jev where the model picks the move and code keeps the rules: tic-tac-toe, Connect Four, Battleship, and Wordle.
Jev CookbooksPlayground#community#playground#games
Community
Jev plays Pac-Man
An autonomous Pac-Man recreation steered by Jev: before each junction the game sends the maze, actors, and legal directions as structured data, and Jev returns one direction with a probability per option.
Jev CookbooksPlayground#community#playground#games
Community
Tetris × TypeSafe
A playable Tetris where you can drop pieces yourself or let the TypeSafe Choice primitive pick every move.
Jev CookbooksPlayground#community#playground#games
Community

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