LUCIE-7B is one of the first large language models that’s truly open, from training code to dataset. This talk shares how we built it using 512 GPUs, a multilingual tokenizer, and public data. We explain the challenges, the lessons, and the reasons behind our open approach. OpenLLM France is building a European AI ecosystem based on transparency and trust. In 2025, we’ll push further: larger models, multimodality, and on-device AI for all.