Jev and the Return of the Zero-Shot Classifier
Glean, Tuesday, September 29th, 2026
Glean explains Jev, a model for typed decisions, and benchmarks it on classification, routing, reranking and citation judging.
Glean's engineers describe Jev, a 'System One' model that takes context plus a fixed set of questions and options and returns choices, scores and probabilities instead of generated text.
The post compares Jev with alternative approaches for producing labels, scores and yes/no answers, and acknowledges skeptics' points about classifiers, structured outputs and small models.
Glean benchmarks Jev across four enterprise uses: classification, routing, reranking and citation-support judging.