Seedance 2.5

• 🏢 ByteDance Seed's flagship video generation family, dated August 2026.
• 📏 Up to 30 seconds of video in a single pass.
• 🆕 Joint audio–video generation: dialogue, ambience and score together.
• 🔧 Finished clips can be extended twice for longer stories.
• 🎯 Precise reference control plus editing of generated footage.
• 👁️ Smoother, more consistent motion and more realistic visuals than before.
• 💬 This catalogue entry is the text-to-video route of the family.
• 🌐 Sits beside ByteDance's Seedream still-image models on this catalogue.

ByteDance

ByteDance is a Chinese internet technology company headquartered in Beijing's Haidian district, with an associated variable-interest entity incorporated in the Cayman Islands. Best known as a consumer internet operator at enormous scale, it has also become a…

Seedance 2.5 is the current flagship of ByteDance's Seedance video line, part of the broader Seed research effort that also produces the company's image models. ByteDance describes it as a next-generation audio–video joint generation model built for 30-second storytelling, with precise reference control and editing layered on top of generation. In practice, a single prompt can yield a continuous scene with synchronized sound rather than a silent few-second clip that needs stitching and scoring afterwards.

The clearest generational change from earlier Seedance releases is duration and continuity: ByteDance says clips can run up to 30 seconds in one generation and be extended twice for richer, more complete storytelling, with motion that is smoother and more consistent and visuals that are more realistic than the prior generation.

Reference handling is the other axis ByteDance highlights. The model is designed around stronger reference control and post-generation editing, which suits ads, product shots, dialogue scenes and episodic work where a character or product must look identical across cuts.

On this catalogue it sits alongside ByteDance's still-image siblings — Seedream V5 Pro and the lighter Seedream V5 Lite, plus the older Seedream V4.5 — so stills generated there can serve as references for video work here.