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What is SeeDance 2.0?
SeeDance 2.0 is the second-generation video model from ByteDance, available on UnificAlly as Pro, Mini, and Fast variants. The headline addition over the 1.x line is omni-reference mode, where a single call accepts up to nine media inputs across images, videos, and audio, referenced inline in the prompt with @Image1, @Video1, and @Audio1 placeholders. Videos run 4 to 15 seconds. Mini and Fast generate at 480p or 720p, and Pro at 720p, 1080p, or 4K. The other two modes are familiar: text-to-video with full aspect-ratio control, and first-and-last-frame interpolation that takes a start image and an optional end image.
Key features of SeeDance 2.0
Four features cover what the model actually changes versus the 1.x line.
Omni-reference up to 9 media inputs
Mix images, videos, and audio in a single call. Reference each one in the prompt with @Image1, @Video1, @Audio1 placeholders. Audio inputs are capped at 15 seconds each. Useful for combining a look, a motion source, and a cue track in one render.
4 to 15 second videos
Wider duration range than 1.5 Pro, in single-second increments. Same range across text-to-video, first-and-last-frame, and omni-reference modes.
Pro and Fast variants on the same API
Pro outputs 720p, 1080p, or 4K. Mini outputs 480p or 720p at the lowest cost. Fast outputs 480p or 720p and prioritises throughput. All share the same parameter surface, so switching is a one-line model ID change.
First-and-last-frame interpolation
Pass optional first_frame_url and/or last_frame_url. Aspect ratio is auto-detected from the input. Useful for product reveals and bookended brand stings.
What SeeDance 2.0 is best for
Reference-rich creative briefs
Combine a style image, a motion video, and an audio cue in one omni-reference call. One render produces a result that previously needed three separate passes.
Long-form social cuts
15-second videos at 1080p on Pro, in vertical or square ratios, ready for paid social slots without an edit step.
Throughput batches on Fast
Fast variant for prompt sweeps and high-volume drafts. Switch to Pro for the keepers.
First-and-last-frame product reveals
Bookend the shot with the SKU shot and the packaged shot. The model interpolates motion between them.
Reproducible generation
Seed plus the same prompt and references returns the same video. Useful for locking a draft before you re-render at 1080p.
Style transfer with motion source
Pass a still image as the look reference and a video as the motion reference. Omni-reference combines them in a single call.
SeeDance 2.0 variants
SeeDance 2.0 has three callable variants on the same API. Each one has its own model ID and price.
Pro
The higher-quality variant. Outputs at 720p, 1080p, or 4K. Use it for the final pass on hero videos, paid placements, and anything that has to land at 1080p or 4K.
Mini
The compact variant. Same three modes and omni-reference controls as Pro, outputs at 480p or 720p at the lowest cost. Use it for draft loops at 480p and final renders at 720p. Move to Pro for 1080p or 4K.
Fast
The throughput variant. Outputs at 480p or 720p and runs faster per video. Use it for prompt sweeps, draft passes, and high-volume batches before locking the keepers on Pro.
SeeDance 2.0 use cases
Run a single omni-reference call that takes a style image, a reference video for motion, and an audio cue to land a 15-second cinematic video at 1080p or 4K. Storyboard a product reveal with first-and-last-frame mode by giving the model the SKU shot and the packaged shot. Run a prompt sweep on Fast at 720p, lock the keeper with a seed, then re-render on Pro at 1080p or 4K. Generate vertical 9:16 cuts and 16:9 paid-ad cuts from the same prompt by changing the aspect ratio.
SeeDance 2.0 API examples
Call SeeDance 2.0 from any language by POSTing to /v1/tasks. Full parameter docs live at docs.unifically.com/models/video/bytedance/seedance-2.0-pro.
curl -X POST https://api.unifically.com/v1/tasks \
-H "Content-Type: application/json" \
-H "Authorization: Bearer YOUR_API_KEY" \
-d '{
"model": "bytedance/seedance-2.0-pro",
"input": {
"prompt": "Cinematic slow-motion shot of a dancer performing on a rain-soaked stage",
"mode": "text_to_video",
"aspect_ratio": "16:9",
"duration": 10,
"resolution": "1080p"
}
}'
Successful submission returns a task_id. Poll GET /v1/tasks/<task_id> or set a callback_url on the request to receive the finished result.
FAQ
SeeDance 2.0に関するよくある質問
SeeDance 2.0 is the second-generation SeeDance video model from ByteDance. It supports text-to-video, first-and-last-frame, and an omni-reference mode that accepts up to nine image, video, and audio references in a single call. Videos run 4 to 15 seconds, at 480p or 720p on Mini and Fast and at 720p, 1080p, or 4K on Pro.
Three. Pro is the higher-quality variant, with output at 720p, 1080p, or 4K. Mini is the compact, lowest-cost variant, at 480p or 720p. Fast prioritises throughput, also at 480p or 720p.
A single call can take up to nine media references (images, videos, and audio, with audio capped at 15 seconds each). Reference them in the prompt with @Image1, @Video1, @Audio1 placeholders. Useful for combining a look, a motion source, and an audio cue in one render.
4 to 15 seconds, in single-second increments. Same range across all three modes (text-to-video, first-and-last-frame, omni-reference).
Yes. The generate_audio field is on by default and adds synchronized audio to the output; set it to false for a silent video. In omni-reference mode you can also pass audio references to guide music, voice, or timing.
1.5 Pro is single-shot video, no references, up to 12 seconds. 2.0 adds the omni-reference mode (up to nine media inputs), pushes duration to 15 seconds, and offers a Fast variant for throughput.
Yes. Pass an integer seed alongside the prompt and references. The same prompt, references, and seed return the same render. Useful for locking in a video you want to re-render at higher resolution on the Pro variant.
You can try it free. New UnificAlly accounts start with a $0.50 signup balance, enough for a short test clip on SeeDance 2.0 Mini, the lowest-priced SeeDance 2.0 model, and every SeeDance model runs in a browser playground. After that, billing is pay-per-use with no subscription, and the balance never expires.
SeeDance 2.0のガイドと比較
このモデルを実行する前に、料金、制限、テスト済みの出力をご確認ください。
SeeDance 2.0 API pricing
SeeDance 2.0 API pricing from $0.022 per second on UnificAlly: Pro, Fast and Mini rates from 480p to 4K, video-input pricing, and the cheapest setup.
SeeDance 2.0 API pricingを読む
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