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license: apache-2.0
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The Apertus Series of open Language Models represents a new standard in truly open-source language model development.
All
- Model weights
- Training data (web-compliant)
- Training code
- Technical documentation
are publicly available, for full transparency and reproducibility.

The series includes Base, Instruct, and quantized variants across two parameter sizes (8B and 70B), along with a specialized 70B reasoning model.
Apertus is designed to support a wide range of research and application needs, while pushing the boundaries of openness in AI.


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