- Apertus 1.5 is an update to the 8B and 70B models, adding image understanding, thinking mode, longer context, better instruction-following, and improved tool use.
- The models are fully open source with open weights, data, values, and training details, released on July 24, 2026.
- Key enhancements include native image understanding, optional thinking mode for reasoning, a 262,144-token context window, improved adherence to instructions, and better tool integration.
- The 70B model can interpret multimodal inputs like technical drawings, and a technical report with benchmarks will be published soon.