Jev case: After ChatGPT, this co-inventor spent 2 years on
Covered TypeSafe shipping Jev after two years on RLCD, noting its speed, cost, and decision-focused design.
The original post
After ChatGPT, this co-inventor spent 2 years on a different training path (RLCD). TypeSafe is shipping Jev today: 20-200x faster, 40-400x cheaper (output tokens free on their claim), built for decisions not chat. Where to open: https:// typesafe.ai/blog/introduci ng-system-one-models-and-jev …
Engagement when collected
Numbers are a snapshot taken from X when the case was added to the library (schema v1, collected 2026-09-19); they will not match today.
Where this case fits
Filed under general Jev builds. In the pattern Jev is built for, the model answers a bounded question per step — and ordinary code acts on the answer, because the answer is already a value rather than a paragraph. Browse the full case library for the work it sits next to.
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Last updated: 2026-09-22 · sources & corrections · every card links to its author's original post