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ByteDanceVideo

Seedance 2.0 Fast

Fast multimodal video with audio and clips up to 15 seconds.

video/seedance-2-fast
Try it in StudioUse with your agent or API

Earth zoom out: she waves as the camera pulls smoothly back and up; the tiny planet shrinks and rotates, revealing it floating in a pastel starry sky among other little planets with their own houses and trees, connected by glowing paths. Continuous smooth pull-back. One continuous shot, no cuts, consistent character, correct anatomy and hands, no text, no logos, no captions.

Price
~24.2 credits / second
Makes
Text to video, Image to video, Reference to video
Clip length
4 to 15 s

Best for

Seedance 2.0 Fast is the speed tier of ByteDance's Seedance 2.0. It supports text, a start image with optional end frame, and reference images or clips, with the widest range of aspect ratios in Summer's video lineup.

  • Longer single shots, up to 15 seconds, for trailers and teasers.
  • Start-to-end-frame animation, such as a door opening or a transformation between two poses.
  • Vertical 9:16 and ultrawide 21:9 cuts of the same idea for different platforms.

Put it together

Where Seedance 2.0 Fast fits in a game, with the models it works well with. Your agent runs every step.

Price

ModeModelPrice
Text to videoSeedance 2.0 Fast~24.2 credits / second
Image to videoSeedance 2.0 Fast~24.2 credits / second
Reference to videoSeedance 2.0 Fast~24.2 credits / second

Paid from your Summer credits; ~ marks a typical estimate for token-priced output.

Use it from code or your agent

Sign in once with summer login. Your agent or your code then runs it with your paid credits.

npx -y summer-engine@latest login
npx -y summer-engine@latest api run video/seedance-2-fast \
  --input '{"prompt":"a dragon circling a castle at dawn","duration":5}' \
  --download .

video/seedance-2-fast: about $0.2419 per second of video. Paid from your Summer credits.

Inputs

What input takes for video/seedance-2-fast. Send only what you need; Summer fills in tested defaults.

  • promptstringup to 4000 characters

    What happens in the clip. Needed without imageUrl.

  • imageUrlstringup to 2048 characters

    A public image URL to animate (image to video).

  • endImageUrlstringup to 2048 characters

    With imageUrl: the last frame. The same image as imageUrl makes a seamless loop. Models with an end frame: Seedance, Kling 3, Wan, Vidu, LTX 2.5, Luma, MiniMax.

  • referenceImageUrlsarray of string1 to 10 items

    Reference to video: public images of the characters, props or style to keep (with a reference model, e.g. kling-4-ref). Motion transfer: the character to move.

  • videoUrlstringup to 2048 characters

    An input clip (public URL, at most 20 s): restyle or reframe it, move a character with its motion, or add sound to it (e.g. kling-video-to-audio). Billed on the clip's length.

  • durationintegerDefault 5 · 1 to 20

    Seconds; the model renders its nearest supported length.

  • aspectRatioenumDefault 16:9
    • 16:9
    • 9:16
    • 1:1
    • 4:3
    • 3:4
    • 21:9
    • 3:2
    • 2:3
    • auto
  • negativePromptstringup to 1000 characters

    What the clip must not show.

  • resolutionenum

    Only a quality the model offers; leave out for its default.

    • 720p
    • 1080p
    • 4k
    • 480p
    • 768p
    • 2k
    • 768P
    • 1080P
    • 480P

Model docs · Summer API docs · Set up the Summer MCP server · Try it in the browser

Questions

What is Seedance 2.0 Fast good for in game development?
Seedance 2.0 Fast is the speed tier of ByteDance's Seedance 2.0. It supports text, a start image with optional end frame, and reference images or clips, with the widest range of aspect ratios in Summer's video lineup. Typical game uses: longer single shots, up to 15 seconds, for trailers and teasers; start-to-end-frame animation, such as a door opening or a transformation between two poses; vertical 9:16 and ultrawide 21:9 cuts of the same idea for different platforms.
How much does Seedance 2.0 Fast cost in Summer?
In Summer Studio: Seedance 2.0 Fast (text to video): ~24.2 credits / second; Seedance 2.0 Fast (image to video): ~24.2 credits / second; Seedance 2.0 Fast (reference to video): ~24.2 credits / second. Prices marked ~ are typical estimates because the provider bills by tokens or output size. It is charged from your Summer credits.
What can Seedance 2.0 Fast generate, and how long are the clips?
In Summer, Seedance 2.0 Fast supports text to video, image to video, and reference to video. Generated clips run 4, 5, 6, 8, 10, and 15 seconds, in 16:9, 9:16, 1:1, 4:3, 3:4, and 21:9 aspect ratios.
Can I use Seedance 2.0 Fast from Claude Code, Cursor or Codex?
Yes. Connect the Summer MCP server to Claude Code, Cursor, Codex or another MCP client, then ask your agent to generate with summer_generate_video with model: "seedance-2-fast". Setup instructions are at summerengine.com/mcp.
Where do Seedance 2.0 Fast results go?
Every generation is saved to your Summer asset library. From there you can download it or bring it into a Summer Engine project.