Swiss AI Releases Apertus 1.5: Multimodal Enhancements and Extended Context Under Apache 2.0

1 reports archived1 independent sourcesupdated 10/15/2026, 17:08:45

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Swiss AI released Apertus 1.5, extending the 8B and 70B models with image/audio understanding via continued pretraining. The update introduces an optional thinking mode, quadruples the context window, and improves instruction following and tool use, with weights available under Apache 2.0.

LATEST/Swiss AI released Apertus 1.5, extending the 8B and 70B models with image/audio understanding via continued pretraining. The update introduces an optional thinking mode, quadruples the context window, and improves instruction following and tool use, with weights available under Apache 2.0.

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Hugging Face BlogT1·Oct 15, 17:0868 pts
Swiss AI Releases Apertus 1.5: Multimodal Enhancements and Extended Context Under Apache 2.0
- Transitioned from text-only to multimodal (image/audio) via continued pretraining on 4 trillion tokens
- Quadrupled context window length while retaining an optional chain-of-thought reasoning mode
- Released under strict Apache 2.0 license with comprehensive technical documentation (arXiv:2610.15542)
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