Jev case: A ChatGPT inventor built a model that #98949
Reported on Diogo Almeida's TypeSafe AI shipping Jev, a non-LLM transformer built for decisions rather than language generation.
The original post
A ChatGPT inventor built a model that doesn't speak Diogo Almeida helped invent RLHF at OpenAI, then got tired of models that crush language and still can't run software. His startup TypeSafe AI shipped Jev this week — a transformer that isn't an LLM. It doesn't write sentences.
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