The Jev Revolution: What Engineers Are Already Building with System One Models

At the AI Engineer Code Summit, TypeSafe AI CEO Diogo Almeida argued that system one models like Jev—non-generative models returning structured choices, scores, or probabilities—should be integrated directly into application code to make software more reliable and automate more tasks. Glean's Chinmay Goyal said Jev is used alongside LLMs and other classifiers for its zero-shot flexibility, while UiPath and Workday engineers demonstrated prototypes including sub-second document-chunk ranking and interfaces that predict what a user wants to do while they type.