Hosted route
Jev
TypeSafe AI · Hosted access
Primitives: Choice, Score, NoulPricing: Hosted usage; confirm current provider terms.
Decision model guide
What Is a System One AI Model?
System One is an emerging product and research term for fast, structured decisions over state—not a long-established universal industry standard.
JevClassify is an independent guide and is not affiliated with TypeSafe AI or ConvAI Innovations.
Quick answer
What is a System One model?
The term describes a decision-oriented model shape: state plus a structured question goes in, and a typed decision with probabilities or a score comes out. TypeSafe AI uses the term for Jev; Laya project materials use related System 1 decision language. Treat the terminology as source-specific and evolving.
Input and output
Traditional LLMPrompt → token generation → text
System One / Decision ModelState + structured question → decision + probabilities
Current examples
Jev and Laya share a decision-oriented vocabulary.
Open-weight route
Laya
ConvAI Innovations · Self-hostable
Primitives: choice, score, noulLicense: Apache 2.0 (project/model card)Pricing: No API subscription described; compute, storage and operations remain the user's responsibility.
System One vs classifier
A classifier commonly maps text to labels; a decision model can expose a broader typed question contract such as Choice, Score or Noul.
System One vs rule engine
Rules are explicit and deterministic. A decision model learns from examples and still needs evaluation, thresholds and review boundaries.
Limitations
Structured output does not guarantee correctness. Validate the rubric, calibration, coverage and failure handling before automating action.
Try a decision model
Run a real Jev classification task.
This site has a hosted Jev classifier available. Laya is documented as an external open-weight project and is not connected here.