Long-form AI video with reference control and native audio
Seedance 2.5 is the longest-running video model on Vixlens, and the one to reach for when a shot has to hold. Give it a reference image and it keeps the same face, product or set across the whole clip instead of redrawing them shot to shot, with a soundtrack generated alongside the picture rather than dubbed on afterwards.
Real output from Seedance 2.5, with the prompt that produced it.
Live-action anime adaptation — twin breathing-technique fighters clash on a storm-battered coastal cliff shrine at dusk, whip-pan cuts every 1.5s and volumetric fire FXA flamenco dancer alone in a dark practice room, driving a long footwork sequence until dust lifts off the boards and hangs in the lightA night stage of a gravel rally — a boxy 1980s four-wheel-drive rally car comes through a long left-hander in the pines
What Seedance 2.5 is good at
Holds a subject's identity across a long take from a single reference still
Audio is generated with the picture, so footsteps and dialogue land on frame
Aspect ratios from cinematic 21:9 down to vertical 9:16 without recropping
Adaptive duration lets the model choose the length the prompt actually needs
What people use it for
Product films that have to show the real product, unchanged, end to end
Story beats too long for the 5-to-10-second ceiling most models stop at
Talking-head and performance clips where the audio has to match the motion
Written for this model in particular. Open one in the composer and edit it from there.
“A night stage of a gravel rally — a boxy 1980s four-wheel-drive rally car comes through a long left-hander in the pines, headlights raking the trunks, gravel spray backlit by the follow car”
Seedance 2.5 is an AI video model from ByteDance, available on Vixlens. Seedance 2.5 is the longest-running video model on Vixlens, and the one to reach for when a shot has to hold. Give it a reference image and it keeps the same face, product or set across the whole clip instead of redrawing them shot to shot, with a soundtrack generated alongside the picture rather than dubbed on afterwards.
How long can a Seedance 2.5 clip be?
Seedance 2.5 generates clips of 4–30s, or adaptive.
What resolution does Seedance 2.5 output?
Seedance 2.5 outputs at 480p, 720p, 1080p on Vixlens.
Does Seedance 2.5 generate audio?
Yes — Seedance 2.5 generates the soundtrack together with the picture, so it stays in sync with the motion.
Is there a free way to try Seedance 2.5?
Yes. The Free plan includes 50 credits when you sign up, with no credit card required. Credits are spent per generation based on the model, resolution and duration, and the exact cost is shown before you generate.