1. One or more computer-readable media having computer-executable instructions embodied thereon that, when executed by a computing device, cause the computing device to generate a graphical user interface (GUI) for visualizing a performance of a machine-learned model, the GUI comprising: an item representation display area that displays a plurality of item representations corresponding to a plurality of items processed by the machine-learned model, each of the plurality of item representations arranged according to a score assigned to an item corresponding to the each of the plurality of item representations by the machine-learned model, and the each of the plurality of item representations being visually configured to represent a label assigned to an item corresponding to the each of the plurality of item representations.