Wan AI is a state-of-the-art open-source video generation model from Alibaba that produces high-quality, physically coherent video from text and image prompts with a strong focus on motion realism and visual fidelity. Released as an open-weight model, Wan enables developers and researchers to run video generation locally, fine-tune for specific use cases, and build video AI applications without per-generation API costs. The release established Wan as one of the most capable open-source alternatives to commercial video generation services, advancing the democratization of professional-quality AI video creation.