Methods and systems of classification model evaluation are described. A processor may generate a classifier track comprising visual indicators representing the set of classifier labels. The classifier labels may be based on output data of a classification model. The processor may generate a label track comprising visual indicators representing a set of observed labels received from a device. The processor may output the classifier track and the label track on a user interface. The processor may receive a request to evaluate the classification model, where the request may indicate a performance metric. The processor may identify a set of operators associated with the performance metric. The processor may execute the identified set of operators on the classifier track and the label track. The processor may generate a performance track indicating the performance metric of the classification model. The processor may output the performance track on the user interface.