The paper titled 'Aria: An Open Multimodal Native Mixture-of-Experts Model' focuses on integrating multimodal information using an open-source model named Aria. With 3.9B and 3.5B activated parameters for visual and text tokens respectively, it outperforms similar proprietary models. Authors introduce a 4-stage pre-training pipeline, including stages for language and multimodal understanding as well as instruction following.