Apertus: a fully open, transparent, multilingual language model
ethz.ch
On 2 September 2025, EPFL, ETH Zurich and the Swiss National Supercomputing Centre (CSCS) released Apertus - Switzerland’s first large-scale, open, multilingual language model — a milestone in generative AI for transparency and diversity.

EPFL, ETH Zurich and the Swiss National Supercomputing Centre (CSCS) released Apertus today, Switzerland’s first large-scale, open, multilingual language model — a milestone in generative AI for transparency and diversity.