TabPFN-3: Technical Report. - Léo Grinsztajn; Klemens Flöge; Oscar Key; Felix Birkel; Philipp Jund; Brendan Roof; Mihir Manium; Shi Bin Hoo; Magnus Bühler; Anurag Garg; Dominik Safaric; Jake Robertson; et al. (CoRR, 2026)