Swiss open model Apertus resurfaces amid sovereign-AI debate

Category: Pulse
Status: discussion
Sources: ETH Zurich release, HN
Summary: Apertus, the fully open multilingual model released 2025-09-02 by EPFL, ETH Zurich, and the Swiss National Supercomputing Centre (8B and 70B, Apache-2.0, trained on 15 trillion tokens across 1,000+ languages with open data and recipes), returned to the HN front page at 306 points. The thread frames the nine-month-old model through the sovereign-AI lens raised by the Fable 5 and Mythos 5 export-control story.
Comments: Commenters report the models trail more recent open releases such as Nemotron and OLMo 3.1 on benchmarks, and that the March 2024 knowledge cutoff and weak handling of language-specific tasks limit practical use; others debate whether open weights alone constitute sovereignty without independent training capacity.