PRiSM: Benchmarking Phone Realization in Speech Models. - Shikhar Bharadwaj; Chin-Jou Li; Yoonjae Kim; Kwanghee Choi; Eunjung Yeo; Ryan Soh-Eun Shim; Hanyu Zhou; Brendon Boldt; Karen Rosero Jacome; Kalvin Chang; Darsh Agrawal; Keer Xu; et al. (CoRR, 2026)