@misc{arxiv_2610_15542v1,
  title = {Apertus 1.5: From Open Text Models to Open Multimodal Reasoners},
  author = {{Project Apertus} and {Yixuan Xu} and {Yassine Turki} and {Vinko Sabolčec} and {Valentina Pyatkin} and {Tommy Chu} and {Sven Najem-Meyer} and {Sean F. Carroll} and {Robert Smith} and {Raphael Kreft} and {Oscar Alessandro Tazza} and {Oleg Lavrovsky} and {Nicola Irmiger} and {Matteo Santelmo} and {Marian Schneider} and {Juan García Giraldo} and {Hanna Yukhymenko} and {Eduard Ďurech} and {Davit Melikidze} and {Dani Tamayo} and {Bettina Messmer} and {Aryan Ahadinia} and {Anunay Yadav} and {Allen Huang} and {Ahmad Fraij} and {Alessandro Bombarda} and {Alex Padula} and {Alexander Hägele} and {Alexander Sternfeld} and {Anna Hedström} and {Anna Kosovskaia} and {Arthur Wuhrmann} and {Arundhati Balasubramaniam} and {Badr Al Mahouri} and {Barna Pasztor} and {Bartosz Szostakiewicz} and {Bich Ngoc Doan} and {Bryan Schmid} and {Burak Sezen} and {Camille Challier} and {Clément Charmillot} and {Dana Shayakhmetova} and {Daniel Perruchoud} and {David Brüggemann} and {David Isztl} and {Elia Palme} and {Emma Anastassova} and {Fabian Bösch} and {Faruk Zahiragić} and {Fawzi Roberto Mohamed} and {Fiona Panicali} and {Florian Kolly} and {Flynn Guerra} and {Francesco Monti} and {Frederike Lübeck} and {Gennaro Oliva} and {Haofeng Yang} and {Haoliang Shang} and {Helen El Khoury} and {Henrique Mendonça} and {Jannis Vamvas} and {Jérome Landolt} and {Jessica Lam} and {Jingchun Xiao} and {Jonathan Coles} and {Joshua Oyebanji} and {Khanh Nguyen} and {Konstantinos Pitas} and {Lasse B. Strand} and {Li Mi} and {Loïc Deslarzes} and {Lorenzo Baggi} and {Lorenzo Noci} and {Luca Baumann} and {Luca Sartori} and {Lukas Drescher} and {Marco De Negri} and {Marco Passerini} and {Mark Klein} and {Marko Stojanovic} and {Martin Majsec} and {Matin Ansaripour} and {Mattea Busato} and {Mauro Pellonara} and {Max Neuwinger} and {Michael Graber} and {Michal Tešnar} and {Michelle Wastl} and {Miguel Gila} and {Mikolaj Boronski} and {Morgane Magnin} and {Moritz Reihs} and {Mukhammadali Sayfiddinov} and {Nathan Ranchin} and {Nicolas Cuveillier} and {Oscar Wohlfahrt} and {Qianqian Zou} and {Rada Kamysheva} and {Rita Sevastjanova} and {Roman Machacek} and {Sebastian Keller} and {Simon Matrenok} and {Simon Pierre} and {Stefano Schuppli} and {Suei-Wen Chen} and {Szabina Horváth-Mikulas} and {Taliesin Perez} and {Thilo Spinner} and {Thomas Kleine Buening} and {Tim Robinson} and {Tymoteusz Kwiecinski} and {Vilém Zouhar} and {Vinzenz Thoma} and {Xiaozhe Yao} and {Yannick Metz} and {Yuhei Fukuhara} and {Yusif Askari} and {Zixuan Chen} and {Alexander Ilic} and {Ana Klimovic} and {Andreas Krause} and {Andrei Kucharavy} and {Elliott Ash} and {Joost VandeVondele} and {Martin Rajman} and {Mennatallah El-Assady} and {Thomas Schulthess} and {Timo Kehrer} and {Torsten Hoefler} and {Antoine Bosselut} and {Martin Jaggi} and {Imanol Schlag}},
  eprint = {2610.15542v1},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2610.15542v1}
}