Alibaba has open-sourced LOGOS, the first multi-domain scientific generative foundation model based on a unified scientific syntax, co-developed with Renmin University. LOGOS-1B with 1B parameters outperforms Microsoft's NatureLM (8x7B) on key tasks, covering 7 modalities and 44.87B tokens. Its unified token sequence eliminates the gap between pretraining and downstream applications. Model weights, inference code, and technical report are fully open-sourced.