// ENGINE 01 — BYTEDANCE
Seedance 2.5
Longest clips yet — up to 30s with audio. The new flagship — 30-second clips with native audio, twice the length of anything else here.
- CREDITS
- 270 cr
- QUALITY
- best
- SPEED
- fast
- DURATIONS
- 10 / 20 / 30s
- ASPECTS
- 9:16 · 16:9 · 1:1 · auto
- IMAGE INPUT
- first frame
GENERATE
— renders with seedance 2.5 — 270 crPROMPT SAMPLES
— written for this engine — use one as a starting pointPROMPT_01
Thirty seconds: dawn breaks over a fishing village — first the lighthouse beam fades, then boats push off one by one, and the camera rises to reveal the whole harbor waking as gulls and engine sputter build.
PROMPT_02
A single unbroken shot follows a letter: written by candlelight, sealed, carried through a rainy street, and opened by trembling hands at a lit doorway — strings swelling as the seal breaks.
PROMPT_03
A city intersection across one day in timelapse: dawn commuters, noon crowds, evening neon, midnight stillness — traffic sounds rising and falling with the light.
PROMPT_04
A potter throws a bowl start to finish: clay centered, walls rising, a wobble caught and saved, the wire pull, and the bowl held up to window light — wheel hum throughout.
PROMPT_05
One take, storm to calm: waves hammer a cliff lighthouse at night, rain thins, clouds tear open, and the sequence ends on flat morning water with one gull crying.
PROMPT_06
A street musician opens her violin case in an empty square; as she plays, passersby gather one by one until the final chord lands on a small crowd applauding.
ABOUT
Seedance 2.5 is ByteDance's newest flagship and the studio's ceiling: 10, 20 or 30-second clips at top-tier quality, with native audio throughout. Thirty seconds is twice what any other engine renders — long enough for a scene, not just a shot.
Length is the point, and the model is built to survive it. Subjects, lighting and camera logic stay coherent across the full window, so a clip can carry an arc — an establishing beat, a development, a payoff — inside one render instead of three stitched ones.
It frames in all four aspect modes from text or an image. At 270 credits it is a deliberate spend: block the scene on a cheaper engine first, then commit here when the idea deserves thirty continuous seconds. For shorter shots with first/last/reference image control, Seedance 2.0 remains the pick.
STRENGTHS
— what this engine does better than the others- 30-second clips — double the longest any other engine here renders
- Scene-level coherence: subjects and lighting hold across the full window
- Native audio for the entire clip — ambience, effects and voices in sync
- Top-tier image quality in every aspect ratio, from text or an image
- Carries a beginning, middle and end in a single render
PROMPTING TIPS
— how to talk to this model- TIP_01Write 30-second prompts as scenes with named beats — what happens at the start, middle and end — not as one long description.
- TIP_02Draft at 10 seconds first; the same prompt scaled to 30 costs three times less to get wrong at 10.
- TIP_03Give the audio an arc too: name what should be heard early and what should swell or cut by the end.
- TIP_04Reserve it for ideas that need continuity; if a shot works at 15 seconds, Seedance 2.0 renders it for a quarter of the credits.
USE CASES
01
Full scenes
A complete story beat — setup, development, payoff — in one continuous render, no stitching or crossfades.
02
Music-video sections
Thirty seconds covers a verse or a chorus, with audio generated in sync for the whole passage.
03
Long product stories
Unbox, reveal, use — product narratives that need room to breathe instead of a cut every five seconds.
04
Establishing sequences
Slow reveals and traveling shots where the payoff only lands after a long, unbroken build.