Apertus – Open Foundation Model for Sovereign AI

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Summary

Apertus is a fully open foundation model for sovereign AI, developed by the Swiss AI Initiative. It is open weights, open data, open science, compliant with EU AI Act, and competitive with top open models at 8B and 70B parameters, supporting over 1000 languages.

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Cached at: 06/22/26, 01:32 AM

# Fully Open Foundation Model for Sovereign AI Source: [https://apertvs.ai/](https://apertvs.ai/) ![Apertus](https://apertvs.ai/images/apertvs.svg) Developed by the[Swiss AI Initiative](https://www.swiss-ai.org/)as a collaborative effort between EPFL, ETH Zurich, and CSCS\. Open weights, open data, open science\. [![Apertus](https://apertvs.ai/images/apertvs.svg)](https://apertvs.ai/) ### Fully Open Training data, code, weights, methods, and alignment principles — all documented and reproducible\. Apertus is to AI as Open is to Source\. ### Compliant at Scale Built to meet EU AI Act requirements: the model respects opt\-outs, removes PII, prevents memorization\. A global foundation to build on\. ### Run for Performance Competitive with top open models at an equivalent scale of 8B and 70B parameters\. Multilingual from day one — trained on 1000\+ languages\. [Swisscom](https://www.swisscom.ch/en/business/enterprise/offer/platforms-applications/data-driven-business/swiss-ai-platform.html)is a Strategic Partner of the Swiss AI Initiative\. [![Swisscom Logo](https://static.wixstatic.com/media/4fb636_b44facb135f84adeb7394df825019ed3~mv2.png/v1/fill/w_375,h_90,al_c,q_85,usm_0.66_1.00_0.01,enc_avif,quality_auto/Swisscom_Horizontal_RGB_Colour_Navy.png)](https://www.swisscom.ch/en/business/enterprise/offer/platforms-applications/data-driven-business/swiss-ai-platform.html) ## Stay Updated Our newsletter will keep you on top of Apertus releases, our team's research, and community news\.

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