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Lead DevelopmentFACT · 4/5•2 Aug '26•Via DEV Community

ByteDance launches Seedance 2.5 — 30s one-take AI video

ByteDance announced Seedance 2.5 on 2026-07-31, an updated generative audio-video model that produces up to 30-second clips with synchronized audio in a single pass (double the previous 15s). The model accepts expanded multimodal references — up to 30 images, 10 video clips and 10 audio clips — and introduces multi-round extension to chain generations while preserving characters, scene and style. Seedance 2.5 adds professional editing controls (timestamp editing, green-screen, camera-perspective changes) and is available now inside ByteDance-operated Jimeng AI and Doubao Pro. Programmatic API access is announced as coming soon via BytePlus ModelArk; weights are not open-sourced and pricing/quotas have not been published.

•ByteDance announced Seedance 2.5 on 2026-07-31.
•Seedance 2.5 generates up to 30-second video clips with synchronized audio in a single pass (previously 15 seconds).
•The model supports up to 30 images, 10 video clips and 10 audio clips as reference in a single generation.

Entities:ByteDance

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