Swiss AI Initiative Releases Apertus — Full Open-Weights 70B Model

Swiss AI Initiative released Apertus — fully open-weights 8B and 70B foundation models with open weights, open training data, and full training recipes. Built by EPFL, ETH Zurich, and CSCS supercomputing. Most transparent large language model attempt to date.

Direct response to AI sovereignty concerns in Europe and elsewhere. Released same week as Fable 5 suspension and Sakana Fugu launch — together they form a clear pattern: 2026 is the year frontier AI access becomes a geopolitical chess piece. For builders: Apertus 70B is a real self-hostable option for data-sensitive workloads where US frontier models are off-limits.

Download weights from huggingface.co/swiss-ai (search 'Apertus'). Self-host on capable hardware. Full training data and recipes published — full reproducibility is possible. For inference, an H100 or equivalent is enough for the 70B model.