Apertus (LLM)

Apertus
Developers
ReleaseSeptember 2, 2025 (2025-09-02)
LicenseApache 2.0
Websiteapertvs.ai

Apertus is a public large language model, developed by the Swiss AI Initiative (a collaboration between EPFL, ETH Zurich, and the Swiss National Supercomputing Centre).[1] It was released on September 2, 2025,[2] under the free and open-source Apache 2.0 license.[3]

Designed initially for business and research use cases around the world,[4] Apertus was trained on over 1800 languages, and comes in 8 billion or 70 billion parameter versions and is available on Hugging Face for download.[5][6] The model was developed aiming to adhere to European copyright law, and is one of the first examples of AI as a public good in the vein of AI Sovereignty.[6][7][8] It is also the first large model to comply with the European Union's Artificial Intelligence Act.[9][7] At its launch, the model creators emphasized multilinguality, transparency, and auditability as priorities in contrast to commercial frontier model.[10] While international reception was largely positive[11], the first iteration was significantly behind the capabilities of frontier models[4] and needs adaptation for many use cases with chatbots being a secondary but not a primary use case.[5]

As of late 2025, it was considered the largest and most capable fully open model.[4] The capability of future models will depend in part on how much more funding can be secured.[5]

See also

References

  1. ^ Moon, Mariella (2025-09-02). "Switzerland launches its own open-source AI model". Engadget. Retrieved 2026-01-21.
  2. ^ "Apertus: a fully open, transparent, multilingual language model". ETH Zurich. September 3, 2025. Retrieved December 2, 2025.
  3. ^ Partington, Miriam (2 September 2025). "Switzerland unveils national LLM in tech sovereignty push". Sifted. Retrieved 12 April 2026.
  4. ^ a b c Ibrahim, Sara (2025-10-06). "Fact and fiction about the Swiss AI model Apertus". SWI swissinfo.ch. Retrieved 2026-01-28.
  5. ^ a b c "Apertus critics "misunderstand" Swiss AI model". SWI swissinfo.ch. 2025-10-21. Archived from the original on 2025-11-02. Retrieved 2026-01-28.
  6. ^ a b Welle, Elissa (September 3, 2025). "Switzerland releases an open-weight AI model". The Verge. Retrieved December 2, 2025.
  7. ^ a b Olff, Sabine (November 28, 2025). "Apertus: The Swiss open-source AI language model". dw.com. Retrieved December 2, 2025.
  8. ^ Khalili, Joel. "The Race to Build the DeepSeek of Europe Is On". Wired. ISSN 1059-1028. Retrieved 2026-01-28.
  9. ^ Kirchner, Malte (September 2, 2025). "Apertus: Switzerland presents first open and multilingual AI model". Heise Online. Retrieved December 2, 2025.
  10. ^ Allen, Matthew (2025-09-02). "Switzerland launches transparent ChatGPT alternative". SWI swissinfo.ch. Retrieved 2026-01-21.
  11. ^ Schneier, Bruce. "OpenAI Has Shown It Cannot Be Trusted. Canada Needs Nationalized, Public AI". The Globe and Mail. Retrieved 16 April 2026.
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