Seedance 2.5 is live on iApp — 30-second AI videos from text, image, video or audio references

Dreamina Seedance 2.5 is now available through the iApp platform, sitting alongside Seedance 2.0 on the same endpoint and the same API key. BytePlus released it on 7 August 2026; it is live on iApp today.

The headline change is length. Seedance 2.0 renders 5-second clips; 2.5 renders up to 30 seconds — long enough for a complete product spot or a scene with a beginning, middle, and end, rather than a loop you have to stitch. Motion is noticeably steadier over that longer window, and the model holds a subject's identity across shots far better than 2.0 did.

One model, four kinds of input

Seedance 2.5 is a single model — dreamina-seedance-2-5-260628 — and you steer it with what you put in the content array:

Content block	Role	What it does
text	—	The prompt. Timestamped beats work well: "0–2s … 2–4s …"
image_url	reference_image	Subject, style or product reference. You can pass more than one.
image_url	first_frame / last_frame	Pin the opening or closing frame.
video_url	reference_video	Match an existing clip's camera work or motion.
audio_url	reference_audio	Use a track as the soundtrack.

That is the same shape as Seedance 2.0 — no new endpoint, no new request format, just a different model value and a much better result.

Same asynchronous submit-then-poll flow, too:

curl -X POST https://api.iapp.co.th/v3/store/video/seedance/tasks \
  -H "apikey: YOUR_IAPP_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "dreamina-seedance-2-5-260628",
    "content": [
      { "type": "text", "text": "A cinematic dolly shot of a Thai floating market at sunrise, mist over the water, vendors paddling past" }
    ],
    "duration": 10,
    "resolution": "720p",
    "ratio": "16:9",
    "generate_audio": true
  }'

Poll GET /v3/store/video/seedance/tasks/{task_id} until the status is succeeded. Polling is free.

Try it

Try Seedance 2.0 Video Generation

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Select Model

Example Prompts

API Key

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Endpoint URL

Generation ModeReference to videoFirst / last frameDescribe the shot. Add reference images for a subject or style, a clip to match its motion, or an audio track to use as the soundtrack.

Reference Image (Optional — add as many as you need)

Reference Video URL (Optional — paste a public URL or upload a clip)

Resolution480p720p1080p (Fast model only)

Aspect Ratio16:9 (Landscape)9:16 (Portrait)1:1 (Square)4:33:421:9 (Ultra-wide)

Duration4s

Generate Audio

Watermark

Estimated cost~18.45 IC(text/image input • ~40K tokens)

cURL Command

Video PromptA cinematic shot of a Thai temple at golden-hour sunset; gentle camera dolly forward; warm light reflecting on calm water.

What it costs

Seedance bills per output token, where tokens scale with resolution and duration. Seedance 2.5 costs about 1.5× Seedance 2.0 per second of video at the same resolution — that is BytePlus's pricing, and our margin over it is unchanged.

Model	Resolution	Input has video?	iApp rate
Seedance 2.5	480p / 720p	no	0.45 IC / 1K output tokens
Seedance 2.5	480p / 720p	yes	0.28 IC / 1K output tokens
Seedance 2.0	480p / 720p	no	0.302 IC / 1K output tokens
Seedance 2.0	1080p	no	0.333 IC / 1K output tokens
Seedance 2.0 Fast	480p / 720p	no	0.242 IC / 1K output tokens

In practice: a 5-second 720p clip from a text prompt costs roughly 51 IC on Seedance 2.5, against about 34 IC on Seedance 2.0. A full 30-second 720p clip lands around 300 IC.

You are only charged for successful generations. Failed jobs — including content-moderation rejections — cost nothing, and polling the status endpoint is free.

Which one should you use?

Seedance 2.5 is not a straight replacement for 2.0. Choose by what the job needs:

• Need longer than 5 seconds, or complex motion? Seedance 2.5. Nothing in the 2.0 family gets close on either, and only 2.5 accepts a reference audio track.
• Need 1080p? Seedance 2.0. Seedance 2.5 currently tops out at 720p.
• Iterating on prompts, or generating variants in bulk? Seedance 2.0 Fast is still the cheapest way to explore, then switch models for the final render.

Both generations stay available on the same endpoint — this is an addition, not a migration. Nothing about your existing Seedance 2.0 calls changes.

Paid accounts only

Seedance remains a premium API: it is available to accounts that have purchased any IC package at least once. The free signup bonus does not unlock it. Video generation is expensive enough per call that we gate it against throwaway signups — a one-time credit purchase enables it permanently, along with the rest of the premium catalogue.

Get started

• Docs: Seedance 2.5 & 2.0 Video Generation
• Pricing: full IC rate table
• API keys: your dashboard

Questions, or want a volume rate for a production workload? Talk to us.