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.

First “modern and powerful” open source LLM?

Key features

  • Fully open model: open weights + open data + full training details including all data and training recipes
  • Massively Multilingual: 1811 natively supported languages
  • Compliant Apertus is trained while respecting opt-out consent of data owners (even retrospectivey), and avoiding memorization of training data