UlazAI - AI Image & Video Tools

Seedance 2.0 + Seedance 2.0 Fast on UlazAI

Seedance 2 API, pricing and fast mode in one workflow

Use Seedance 2.0 when you want the fuller multimodal route, or switch to Seedance 2.0 Fast when turnaround matters more. UlazAI now supports prompt-only generation, first-frame, first + last frame, and multimodal image, video, or audio references in the same Video Studio.

Current UlazAI support covers 480p and 720p, 4 to 15 second renders, aspect ratios 1:1, 4:3, 3:4, 16:9, 9:16, 21:9, adaptive, optional generated audio, returned last frames, and direct URL or asset-style reference handling at the API layer.

Open Seedance 2 Open Seedance 2 Fast Read video API docs Asset ID guide

Modes

Text, frame-lock and multimodal

Choose prompt-only, lock the opening frame, lock the opening and ending frames, or combine reference images, videos and audio.

Pricing

Pricing depends on video input

Seedance 2 Fast starts at 62 credits ($0.62) and Seedance 2.0 starts at 76 credits ($0.76) for 4s 480p without video input. Add video refs and the calculator switches to the higher with-video-input matrix automatically.

Inputs

Images, videos and audio

UlazAI uploads image, video and audio refs through the same studio flow, then sends the resulting URLs to Seedance 2 without separate manual prep.

Routing

Studio first, docs second

Operators can stay inside Video Studio. Developers can inspect the canonical Video Studio API docs and the model matrix without hunting across legacy pages.

Live pricing

Seedance 2 credit matrix

These are the current UlazAI credit values for Seedance 2.0 and Seedance 2.0 Fast. Each row shows with video input / no video input, rounded up to whole credits, across every second from 4s to 15s.

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Seedance 2.0 Fast is cheaper across the current UlazAI matrix, while Seedance 2.0 stays positioned as the fuller route for teams that want the standard workflow.

Seedance 2.0

480p

4s–15s
4s 86 cr ($0.86) / 76 cr ($0.76)
5s 108 cr ($1.08) / 95 cr ($0.95)
6s 129 cr ($1.29) / 114 cr ($1.14)
7s 151 cr ($1.51) / 133 cr ($1.33)
8s 172 cr ($1.72) / 152 cr ($1.52)
9s 194 cr ($1.94) / 171 cr ($1.71)
10s 215 cr ($2.15) / 190 cr ($1.90)
11s 237 cr ($2.37) / 209 cr ($2.09)
12s 258 cr ($2.58) / 228 cr ($2.28)
13s 280 cr ($2.80) / 247 cr ($2.47)
14s 301 cr ($3.01) / 266 cr ($2.66)
15s 322 cr ($3.22) / 285 cr ($2.85)

720p

4s–15s
4s 187 cr ($1.87) / 164 cr ($1.64)
5s 234 cr ($2.34) / 205 cr ($2.05)
6s 280 cr ($2.80) / 246 cr ($2.46)
7s 327 cr ($3.27) / 287 cr ($2.87)
8s 374 cr ($3.74) / 328 cr ($3.28)
9s 420 cr ($4.20) / 369 cr ($3.69)
10s 467 cr ($4.67) / 410 cr ($4.10)
11s 514 cr ($5.14) / 451 cr ($4.51)
12s 560 cr ($5.60) / 492 cr ($4.92)
13s 607 cr ($6.07) / 533 cr ($5.33)
14s 654 cr ($6.54) / 574 cr ($5.74)
15s 700 cr ($7.00) / 615 cr ($6.15)

Seedance 2.0 Fast

480p

4s–15s
4s 71 cr ($0.71) / 62 cr ($0.62)
5s 88 cr ($0.88) / 78 cr ($0.78)
6s 106 cr ($1.06) / 93 cr ($0.93)
7s 123 cr ($1.23) / 109 cr ($1.09)
8s 141 cr ($1.41) / 124 cr ($1.24)
9s 158 cr ($1.58) / 140 cr ($1.40)
10s 176 cr ($1.76) / 155 cr ($1.55)
11s 193 cr ($1.93) / 171 cr ($1.71)
12s 211 cr ($2.11) / 186 cr ($1.86)
13s 228 cr ($2.28) / 202 cr ($2.02)
14s 246 cr ($2.46) / 217 cr ($2.17)
15s 263 cr ($2.63) / 233 cr ($2.33)

720p

4s–15s
4s 151 cr ($1.51) / 132 cr ($1.32)
5s 188 cr ($1.88) / 165 cr ($1.65)
6s 226 cr ($2.26) / 198 cr ($1.98)
7s 263 cr ($2.63) / 231 cr ($2.31)
8s 301 cr ($3.01) / 264 cr ($2.64)
9s 339 cr ($3.39) / 297 cr ($2.97)
10s 376 cr ($3.76) / 330 cr ($3.30)
11s 414 cr ($4.14) / 363 cr ($3.63)
12s 451 cr ($4.51) / 396 cr ($3.96)
13s 489 cr ($4.89) / 429 cr ($4.29)
14s 526 cr ($5.26) / 462 cr ($4.62)
15s 564 cr ($5.64) / 495 cr ($4.95)

Format: with video input / no video input. In the current matrix, adding a video reference switches to the more expensive with-video-input rate.

For real-person footage, use the UlazAI Seedance 2 asset guide first and use the returned asset:// ID. Passing raw files directly may fail.

What changed versus older Seedance flows

First-frame mode

Upload one image to lock the opening shot while the rest of the motion is still generated from your prompt.

First + last frame mode

Upload two images when you need strict opening and ending frame control instead of hoping the prompt lands in the right place.

Multimodal references

Seedance 2 can now consume reference images, videos and audio. UlazAI exposes those inputs directly in the composer instead of hiding them behind manual API work.

Returned last frame

Toggle last-frame return in the studio when you want a frame asset for review loops, handoff, or building the next shot.

Web search toggle

UlazAI now passes Seedance 2 web search as a first-class option in the studio payload instead of forcing model defaults.

Fast and standard in one UI

The composer keeps the same controls for Seedance 2 and Seedance 2 Fast, so teams can switch based on budget or turnaround without relearning the flow.

Seedance 2 FAQ

What is the difference between Seedance 2 and Seedance 2 Fast on UlazAI?

Both routes support prompt-only, first-frame, first + last frame, and multimodal references. The Fast model starts cheaper and is positioned for quicker iteration, while the standard model is the fuller route in the current studio lineup.

Does UlazAI support reference videos and reference audio for Seedance 2?

Yes. The new composer supports image, video and audio refs for Seedance 2 multimodal mode, with direct uploads through the same studio session.

What happens to pricing when I add a reference video?

UlazAI switches the calculator to the with-video-input matrix automatically. In the current Seedance 2 and Seedance 2 Fast tables, that rate is higher than the no-video-input rate.

What should I do for real-person footage?

Follow the UlazAI asset ID guide, then use the returned asset:// ID. This is the safer path for real-person footage and avoids raw-file errors.

Can I still use first and last frame locking?

Yes. That is a separate mode in the composer and it stays isolated from multimodal refs, which matches the current Seedance 2 model contract.

Where do I find the API payload examples?

Use /docs/video-api/ and /docs/video-models/. Those pages now include Seedance 2 and Seedance 2 Fast in the model matrix and example payloads.

Next step

Open the Seedance 2 route that matches your job

Use Seedance 2 for the fuller multimodal workflow, Seedance 2 Fast for cheaper rapid iteration, and the video docs when you need the raw payload contract.

Open Seedance 2 Open Seedance 2 Fast Compare packages