AI article
Jev: The ChatGPT Co-Creator's System One Model Can't Talk
Community description: Diogo Almeida, who co-invented RLHF and InstructGPT at OpenAI, spent two years building Jev: a System One model that cannot generate text, only typed decisions with calibrated confidence. TypeSafe AI prices input at $0.042/MTok, output free, running 70-500ms. Automation needs a model it can trust, not one that talks.
Dev.to | Sep 17, 2026 | @lukeocodes 🕹👨💻
Automated excerpt
Jev runs 70 to 500 milliseconds end to end, prices input at $0. 042 per million tokens, and charges nothing for output. A model built to talk is a different thing from a model built to decide. The confidence value is the whole design.
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