Project Apertus Releases Apertus 1.5 With Image and Audio Understanding

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   Hugging Face BlogPicks

   Apertus 1.5 Release Notes Detail Multimodal Understanding, Thinking Mode, and Longer Context

   Project Apertus released Apertus 1.5 in 8B and 70B sizes, adding image and audio understanding, optional thinking, a 262,144-token context window, and improved instruction-following and tool use. The weights were released on Hugging Face on July 24, 2026 under Apache 2.0; the models generate only text, and spoken-language processing remains experimental. The team also publishes training data, recipes, intermediate checkpoints, and reproducible evaluation records.

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