The evidence
Openness matrix
Walnoot 8B is open-weight. You may use it commercially too and what you download stays yours. The table also shows what is not open.
The matrix
Which artefact is open and under which licence?
| Artefact | Licence | Access |
|---|---|---|
| Weights (8B) | Apache 2.0 | Public, without registration |
| Evaluation logs | Apache 2.0 | Public, raw jsonl |
| Training recipe | Apache 2.0 | Public |
| Evaluation configuration | Apache 2.0 | Public, pinned to 17.6.0 |
| Our Dutch corpus | Documented per source | Provenance public, source data not published by us |
| Training data of the base model | Terms per source | Documented by the Swiss AI Initiative, not ours to publish |
Openness
Will this stay open?
What you have downloaded of the 8B stays yours under Apache 2.0, including for commercial use. The usage policy of the base model, the Apertus LLM Acceptable Use Policy, applies as well. Anyone may build on Walnoot, including a competitor. Openness is our philosophy. Later, larger models may come with different commercial terms. We make that distinction clear from the start.
The layer underneath
What does Walnoot 8B build on?
Walnoot 8B builds on Apertus. The full technical structure, the training steps and our own contributions are described in the model card.
Further in the dossier