True open-source LLM Apertus 1.5 released
Apertus 1.5 is a continued pretraining of Apertus 1.0: we added 4 trillion tokens of text and multimodal training data to the 8B model and 2 trillion tokens to the 70B model. As with every Apertus release, the models are fully open: open weights, open data, open values, and full training details. The updated 8B and 70B models are released on July 24, 2026.
- ▪Apertus 1.5 is a continued pretraining of Apertus 1.0: we added 4 trillion tokens of text and multimodal training data to the 8B model and 2 trillion tokens to the 70B model.
- ▪As with every Apertus release, the models are fully open: open weights, open data, open values, and full training details.
- ▪The updated 8B and 70B models are released on July 24, 2026.
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