PLUTO-4: Frontier Pathology Foundation Models. - Harshith Padigela; Shima Nofallah; Atchuth Naveen Chilaparasetti; Ryun Han; Andrew Walker; Judy Shen; Chintan Shah; Blake Martin; Aashish Sood; Elliot Miller; Ben Glass; Andy Beck; et al. (CoRR, 2025)