Seedance 2.5

Seedance 2.5: the long-take model

Seedance 2.5 is the most advanced model in ClipSpeed’s video generator. Its standout feature is length: a single generation can run anywhere from 4 to 30 seconds, which means a walk, a reveal or a slow push can play out naturally instead of being stitched from short clips. It renders at 480p or 720p, in 9:16, 16:9, 1:1, 4:3, 3:4 and 21:9, and accepts a start frame through “+ Add reference”.

It is also the model behind most of our Prompt Library — the selfie-style clips on this page, where a person talks mid-sentence into a phone held at arm’s length. Seedance is particularly good at that everyday realism: natural skin, believable hand movement, a frame that drifts like a real phone.

Seedance 1 Pro Fast: the iteration model

Seedance 1 Pro Fast (Seedance Fast in pricing) is the recommended default for most shots. It renders 2 to 12 seconds at 480p, 720p or 1080p and is the least expensive video model in credits, which makes it the right place to test a prompt. When the idea works, re-run it on Seedance 2.5 for the longer, richer take.

Prompting Seedance

Seedance 2.5 rewards detailed prompts — our Prompt Library entries run to several sentences. Describe the framing (“chest-up, the phone held at arm’s length”), the person (“early twenties, dark curls, light stubble”), the action and emotion, the setting and the light, and finish with constraints (“one unbroken handheld take, no on-screen text”). Claude or ChatGPT can expand a one-line idea into this format. Our Seedance 2.5 guide has more.

Because it shares a wallet with every other model, you can draft on Seedance Fast, finish on Seedance 2.5, and compare against Kling 3.0 or Veo 3.1 without another subscription.

Costs to plan around

Seedance 2.5 is priced per length and quality, and 720p costs a little over twice 480p, so it pays to lock the prompt on a short 480p render before you commit to a 30-second 720p take.