Abstract: Comparing a challenger model with a primary model is provided herein. In an embodiment, a system comprises one or more processors, coupled to memory, configured to determine, based on a comparison of a first model that is deployed as a primary model with a second model that is acting as a challenger model, that the second model performs better than the first model based on at least one performance metric; determine, based on a comparison of a characteristic of the first model with a characteristic of the second model, to skip a validation process for the second model; and establish the second model as the primary model in the deployment to replace the first model in the deployment.