Jev from TypeSafe
The first (public) System One Model; Jev gives AI the properties of code
1 member lists Jev from TypeSafe, up 1 in the last 12 weeks, data as of 18 September 2026
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Moves that use Jev from TypeSafe
by Sergei GordeichukLLMs
Instead of sending every small classification or scoring task to a full LLM, I'm wiring a dedicated fast decision model (TypeSafe's Jev) into their pipelines to handle high-frequency structured choices. The model returns typed, calibrated outputs (like a probability or category) in tens of milliseconds rather than seconds, making it cheap enough to call on every row, tool call, or event. This week several independent projects appeared that plug this pattern into a database extension, a coding agent's context compaction step, and a local self-hosting effort. I'm not sure about benefits yet, but it's a first step. Here's the inspiration: https://github.com/tamaratran/fast-jev-compaction
Posts about Jev from TypeSafe
- What is a System One model, and where does it go in your stack?
TypeSafe launched Jev on 15 September 2026: a model that returns typed decisions instead of text. Here is what a System One model is, what is proven versus claimed, and where it sits in a stack.