About Jev001

Jev001 is an independent reference for two related things: the hosted System One decision model from TypeSafe AI, and the open decision models — principally Laya — that implement the same pattern.

Editorial rules

• Primary sources first. API behaviour and model versions come from the vendor's own documentation and the model cards; community figures are labelled as such, with a date.
• Numbers carry their date. Both projects changed within a week of launch. Any figure without a date is a bug — tell us.
• Failures are documented. The pages on this site list the model's known weak spots as prominently as its strengths, because that is the part that costs you a production incident.
• No affiliation. This site is not operated by, endorsed by, or paid by TypeSafe AI, ConvAI Innovations, or any repository listed here. No API keys are resold.

Corrections

If a number here is wrong, say so with the source and it gets fixed — the whole point of dating every figure is that they are expected to move.

What is on the site

• What is Jev — the model, its answer types and its documented failure modes.
• Jev API guide — endpoint, model names, SDKs, pricing.
• How to use Jev — runnable examples.
• Laya and Laya vs Jev — the open alternative and how it compares.
• Local runtimes, including Core ML and MLX.
• Projects and benchmarks — the ecosystem and the numbers.

Last updated: 2026-09-21 · sources & corrections