OneDiffusion is a versatile, large-scale diffusion model capable of seamlessly supporting bidirectional image synthesis and understanding across a variety of tasks. The model is expected to release its code and checkpoints in early December. The significance of OneDiffusion lies in its ability to handle tasks related to image synthesis and understanding, marking an important advancement in the field of artificial intelligence, especially in image generation and recognition. Background information indicates that this is a collaborative project developed by multiple researchers, and the research outcomes have been published on arXiv.