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 a 4K lane and a genre hint. 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 live inside omni_reference — either as the platform's start_image / end_image roles or announced inside the prompt — never as a separate mode.

Model split — read this before writing anything. 2.5 tops out at 1080p (no 4K lane) and has no genre hint. Since the 2026-09-26 snapshot it does expose start_image / end_image roles — but only in omni_reference mode. If the job needs 4K or a genre hint, it is a Seedance 2.0 job — ../higgsfield-seedance/SKILL.md. See § Choosing 2.0 vs 2.5.