Gemma: Open Models Based on Gemini Research and Technology
Released by Google.
They use SentencePiece as the tokenizer.

Related
Citation
(Team et al., 2024)
Team, G., Mesnard, T., Hardin, C., Dadashi, R., Bhupatiraju, S., Pathak, S., Sifre, L., Rivière, M., Kale, M. S., Love, J., Tafti, P., Hussenot, L., Sessa, P. G., Chowdhery, A., Roberts, A., Barua, A., Botev, A., Castro-Ros, A., Slone, A., … Kenealy, K. (2024). Gemma: Open Models Based on Gemini Research and Technology. https://arxiv.org/pdf/2403.08295