Jev and Laya: System One decision model use cases.
An independent directory of what people are building with Jev, Laya, and the System One models that follow. Every entry shows the claim, what the evidence supports, and whether we've reproduced it.
Three kinds of question
GlossaryChoice
Pick one option from a list you write. You get the winner and a probability for every option.
support · billing · sales · otherScore
Place the text on a scale you define, from 2 to 10 levels. The answer can land between levels.
urgency: 2 someday … 10 todayNoul
Ask a yes/no question and get one number: the probability the answer is yes.
“Does this ask for a refund?” → 0.93Models
All modelsJev
- Price
- $0.042 per million input tokens, output free
- Latency
- 70–500 ms end to end (vendor figure)
- Released
- 15 Sep 2026
The first model sold as a System One model. You send text and typed questions to a hosted endpoint and get back typed answers with probabilities. It writes no prose.
Laya
- Price
- $0 per token; you pay for your own hardware
- Latency
- 32.8 ms single question on a T4 GPU; 7.2 ms per question in batches of 10 (vendor figures)
- Released
- 18 Sep 2026
An open-weight model that answers the same three question types as Jev and runs on your own GPU or CPU. Three checkpoints ship: English (421M), multilingual for 100+ languages (322M), and one tuned on typed decisions (421M).
Latest in the directory
All 18 entriesUse cases by job
All use casesRouting and triage
Send a message, ticket, or request to the right place before anything expensive touches it.
Guardrails and safety
Check agent actions, inputs, and outputs against a policy, and hold the doubtful ones for a person.
Retrieval checks
Decide whether a passage is relevant, or whether a source actually supports the claim it's cited for.
Scoring and ranking
Put many items on the same scale fast enough to re-sort them live.
Agents and real-time
Pick the next move inside a loop that's already running: a browser agent, a game, a trading bot.
Claim vetting
Flag the tells of an overstated claim: vendor sourcing, missing evidence, unfair comparisons, false precision.
Recipes
All recipesVet a claim with five typed questions
Send a social post or article claim as state, ask who's making it, whether there's checkable evidence, whether its numbers show their method, whether comparisons are fair, and how promotional it reads. Your code turns the five answers into a verdict. This is the rubric behind every entry on this site.
Route uncertain Jev decisions to review
Validate a Jev Choice answer, route eligible labels and send uncertain or invalid answers to review. Includes executable policy tests; no model benchmark is claimed.
Qualify an inbound lead in one call
A form fill or voicemail transcript comes in. Ask the service type, the urgency, and whether it's in your service area, all in one call. Hot leads ring a phone; the rest go to a nurture sequence.
Check whether a source supports a sentence
Before a generated answer ships, pair each cited sentence with its source passage and ask one Noul: does this passage support this sentence? Anything under your threshold gets flagged or dropped.
Guides
All guidesWhat is a System One decision model?
Understand typed decisions, Choice, Score and Noul, with a routing example and links to the model documentation.
Jev or Laya: how to choose
Compare deployment requirements, version-specific evidence and total workflow cost before choosing Jev or Laya.
How to read a launch-week claim
The five questions we ask of every post before it goes in the directory, and the patterns that most often turn a true number into a misleading one.
Questions about Typed Recipes
What is Typed Recipes?
Typed Recipes is an independent directory of use cases, code examples, and guides for System One decision models such as Jev and Laya. Each entry separates the original claim, available evidence, and reproduction status.
What are System One decision models?
System One decision models return constrained decisions, such as a choice, score, or probability, rather than an open-ended text response. This directory explores their use in routing, guardrails, retrieval, and other workflows.
Have the listed recipes been independently tested?
No entry currently carries a Tested by us badge. A source-based verdict is separate from a reproduction test. Check each entry’s evidence and test status before relying on its claims.
Is Typed Recipes affiliated with Jev or Laya?
No. Typed Recipes is independent and is not affiliated with TypeSafe AI, Convai Innovations, or any model vendor.