Jev in production › SDKs and workflow integrations
jev4k
Kotlin DSL and client lets developers declare typed noul, choice and score questions to Jev and read back calibrated answers (jev4k).
- Use
- SDKs and workflow integrations
- Industry
- Developer tools
- Form
- Open-source tool
- Stage
- Announced
- Listed
- 2026-09-26
- Found via
- github
- Repository
- pambrose/jev4k
- Stars
- 12
- Forks
- 2
- Last push
- 2026-10-08
- Language
- Kotlin
- License
- Apache-2.0
The README opens with
A Kotlin Multiplatform DSL and client for TypeSafe's Jev model, for the JVM, Apple platforms, Linux, Windows, and Node.js.
Jev is a System One model: it doesn't generate text. You give it a state (a message, a document, a record) and a set of typed questions, and it returns typed answers with calibrated probabilities that your code can branch on, sort by, and threshold. jev4k lets you declare those questions in Kotlin, send them in one request, and read the answers back as typed values, including enum-valued choices.
Badge
For the project's own README, linking back here:
Also used for sdks and workflow integrations
- JarvisCore (Prescott Data) 434 ms median warm
- Jev for Apple Foundation Models 40–150ms
- Laravel Jev 70–500ms
- JevForce 11.1×
- Semantic Validator 90
- openpave-jev 35 to 500 milliseconds
- Yao Agents 70–500ms
- Juspay NeuroLink ~$0.00002/decision