Higgsfield Seedance 2.5 Director

Seedance 2.5 is a different dialect from Seedance 2.0, not a version bump you can prompt through by habit. 2.0 is a reference-driven shot generator with start/end frames and a 4K lane. 2.5 is an omni-reference production model: up to 50 reference materials, 30-second native runtime, and three non-generation modes — it can edit a video you already have, and extend one forward or backward from its boundary frame.

The prompt grammar changes with it. Reference roles are declared in prose (@Image 1 defines …), audio and text get bracket syntax, long videos are staged with explicit end states, and first/last frames are announced inside the prompt rather than selected as a mode.

Model split — read this before writing anything. 2.5 caps at 720p and has no start_image / end_image media role, no genre hint, and no 4K lane. If the job needs 4K, a genre hint, or platform-level start/end frame pinning, it is a Seedance 2.0 job — ../higgsfield-seedance/SKILL.md. See § Choosing 2.0 vs 2.5.