Apertus: Switzerland’s open-source national LLM
Apertus: Switzerland’s open-source national LLM Switzerland has released Apertus — a fully open, publicly developed large language model built by EPFL, ETH Zurich and the Swiss National Supercomputing Centre (CSCS). Designed as a public AI infrastructure, Apertus aims to offer a transparent alternative to closed models. Key facts Model sizes: 8 billion and 70 billion parameters Training scale: ~15 trillion tokens Multilingual: trained on data from 1,000+ languages (≈40% non-English, including Swiss German and Romansh) Open release: code, model weights, training recipes and datasets publicly available Access: distributed via Swisscom and hosted on Hugging Face Compliance: built to respect Swiss data protection and copyright law Why it matters Apertus is positioned as a public-good AI: fully auditable, reproducible, and intended for research, education, and commercial adaptation. By releasing datasets and…