ByteDance Unveils Seedance 2.5 with Native 4K Video at 30-Second Length

ByteDance's Volcano Engine has released Seedance 2.5, an AI video generation model capable of producing native 4K cinematic content up to 30 seconds long—a significant leap for a field grappling with length, resolution, and visual fidelity. The model, which became available to selected enterprise customers in late July 2026 and was formally announced via Volcano Engine on October 23, 2026, accepts up to 50 multimodal reference inputs (images, video clips, audio tracks, and style guides) in a single generation pass.