Aleph Alpha has released Kolibri, a sovereign open-weight model that is an English-German Mixture-of-Experts Transformer with 78B total parameters. The model is designed for sovereign mission-critical work in regulated areas and is optimized for performance across a wide range of sectors. Kolibri is trained on a dataset that includes German and English text and is designed to be transparent and explainable. The model is available for download under the Apache 2.0 license terms.