When AI Benchmarks Plateau: A Systematic Study of Benchmark Saturation. - Mubashara Akhtar; Anka Reuel; Prajna Soni; Sanchit Ahuja; Pawan Sasanka Ammanamanchi; Ruchit Rawal; Vilém Zouhar; Srishti Yadav; Chenxi Whitehouse; Dayeon Ki; Jennifer Mickel; Leshem Choshen; et al. (CoRR, 2026)