Apertus – Open Foundation Model for Sovereign AI

What happened

A consortium of EPFL, ETH Zurich and the Swiss National Supercomputing Centre (CSCS) released Apertus — a foundation model designed explicitly for Europe's sovereign AI stack.

Context and impact

Apertus is a serious European answer to closed US frontier labs and raises the bar for what 'fully open' means by releasing weights, training data and methodology together. The timing dovetails with Trump's Anthropic curbs, Macron's hunt for a workaround, and the broader European sovereignty debate. For EU teams who cannot send data to US APIs, it is a concrete self-hosting candidate.

Details

• Consortium: EPFL, ETH Zurich, CSCS
• Sizes: 8B and 70B parameters
• 1000+ language support
• Fully open: weights, data and scientific documentation
• Designed to be EU AI Act compliant
• Top discussion on HN (252 points)