Gatekeeper: Improving Model Cascades Through Confidence Tuning - Rabanser, Stephan; Rauschmayr, Nathalie; Kulshrestha, Achin; Poklukar, Petra; Jitkrittum, Wittawat; Augenstein, Sean; Wang, Congchao; Tombari, Federico (Advances in Neural Information Processing Systems, 2025)