Test Seedance 2.5 output quality, estimate credit usage, and generate a sample before you formally integrate.
Create a Sample
Pick a video mode, enter your prompt, and set the parameters.Off by default. Turn on to relax content restrictions (billed at +10%); illegal and prohibited content is always blocked.
Start from the cost of a single sample and pick a testing budget. Expand for detailed rates.
First Test Cost
Text-to-Video - 5s - 480pOne 5s 480p sample
About 14 tests with $10 in credits.
Use 480p for lower-cost prompt iteration, then switch to 720p for the final quality check.
Testing Budget Guide
Pick an amount based on how many tests you expect.Good for a first validation.
Good for prompt iteration.
Good before production integration.
Estimated cost for a 5-second output. Final cost may vary by mode, references, and add-ons.
| Mode | 480p | 720p | Billing |
|---|---|---|---|
| Text-to-VideoStandard | $0.136/s9.34 cr/s | $0.293/s20.09 cr/s | Output video seconds |
| Image-to-VideoStandard | $0.136/s9.34 cr/s | $0.293/s20.09 cr/s | Output video seconds |
| Reference-to-VideoImage or audio reference | $0.136/s9.34 cr/s | $0.293/s20.09 cr/s | Output video seconds |
| Reference-to-VideoVideo reference | $0.083/s5.71 cr/s | $0.179/s12.23 cr/s | Input + output seconds |
| Video EditVideo reference | $0.083/s5.71 cr/s | $0.179/s12.23 cr/s | Input + output seconds |
| Video ExtendVideo reference | $0.083/s5.71 cr/s | $0.179/s12.23 cr/s | Input + output seconds |
Billed by video duration and resolution. Video reference input may be billed by input + output duration. Auto duration (duration: -1) and Video Edit settle on the actual output length, rounded up to the next 0.1s.
| Item | Use Case | Price | Credits |
|---|---|---|---|
| Web SearchPer request | Use when the prompt needs current events, products, or real-world references. | $0.0006 / request | 0.04 cr |
Most first tests only pay the video generation fee. Logged-in users can view grouped live pricing in the console.
Seedance 2.5 is a multimodal video generation model from ByteDance / BytePlus. Its API opened on August 7, 2026. EvoLink now provides text-to-video, image-to-video, reference-to-video, video-edit, and video-extend routes for generating 4–30 second videos at 480p or 720p. It is built for ads, UGC, dialogue, and story workflows that need longer shots, multimodal references, character or product consistency, and synchronized audio.
More reference files do not automatically produce a better result. First-pass usability depends on choosing the right route and giving character, product, scene, motion, and audio references clear roles.
seedance-2.5-text-to-videoGenerate 4–30 second videos from a script, ad brief, or storyboard, with synchronized audio and optional web search.
seedance-2.5-image-to-videoUse one image as the first frame or two images as first-and-last-frame constraints for product, character, and composition-led shots.
seedance-2.5-reference-to-videoCombine image, video, and audio references when character, product, camera motion, action, and sound must be controlled together.
seedance-2.5-video-editEdit an uploaded video with a prompt — remove, replace, or restyle elements. Output length and ratio follow the input video.
seedance-2.5-video-extendExtend an uploaded video forward or backward with continuous motion, up to 30 seconds of new footage.
Keep the entrance, main action, and ending in one ad, dialogue, or story clip.
Use up to 30 images, 10 videos, and 10 audio tracks.
Evaluate visuals, dialogue, sound effects, and pacing in the same task.
Manage long-running jobs with a task ID, polling, and HTTPS callbacks.
Use the EvoLink API for product integration and batch jobs, or call it from Codex, Claude, or Gemini for fast creative and development workflows. Both paths share the same EvoLink API key, balance, model routes, and task history.
Best for: product backends, batch jobs, automated workflows
Call EvoLink’s unified video API from your server and control the model ID, parameters, task queue, callbacks, and result storage.
Best for: creative and development tasks in Codex, Claude, and Gemini
Give the Agent your output goal, assets, and acceptance criteria. It can choose the route, assemble the request, track the task, and return the result without requiring you to hand-code every step.
Illustrative clips for building a prompt and evaluation set. These are not presented as verified Seedance 2.5 API outputs.
This example shows the shortest runnable flow: create a task, save the returned task ID, then poll or wait for an HTTPS callback. Open the API tab for the complete parameter and response reference.
curl -X POST https://api.evolink.ai/v1/videos/generations \
-H "Authorization: Bearer $EVOLINK_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"model": "seedance-2.5-text-to-video",
"prompt": "A premium product film with controlled camera motion",
"duration": 8,
"quality": "720p",
"aspect_ratio": "16:9",
"generate_audio": true,
"callback_url": "https://your-domain.com/webhooks/video"
}'
# Save the returned task ID, then query:
curl https://api.evolink.ai/v1/tasks/{task_id} \
-H "Authorization: Bearer $EVOLINK_API_KEY"Check that duration is 4–30, quality is 480p or 720p, and the asset count and file types match the selected route.
Check the Authorization bearer token and confirm the available balance and task billing in the console.
Review likeness rights, brand assets, readable text, sensitive content, and input-asset compliance.
A Seedance 2.5 task that reaches a final failed state is not charged. Keep the task ID, inspect the final state, and identify whether the cause is validation, review, or execution before retrying.
callback_url must be a public HTTPS URL, not localhost or a private network address. Always keep the task ID as a polling fallback.
Seedance 2.5 is not the default upgrade for every task. Use the same brief, input assets, and acceptance criteria to compare usable-shot rate, reruns, and total project cost.
| Decision factor | Seedance 2.5 | Seedance 2.0 | MiniMax H3 |
|---|---|---|---|
| Best suited to | 16–30s shots, multimodal references, UGC, ads, and dialogue | Mature Seedance workflows, shorter shots, and fast iteration | 2K short clips, action, and high-detail visuals |
| Duration | 4–30 seconds | 4–15 seconds | 4–15 seconds |
| Resolution | 480p / 720p | 480p / 720p / 1080p (higher on some Standard tiers) | 2K |
| Inputs | Text, first/last frames, image/video/audio references | Text, images, and multimodal references | Text, first/last frames, and multimodal references |
| Cost decision | Measure cost per usable shot and whether longer clips reduce editing and reruns | Keep the current baseline and use the same brief to test whether upgrading is worthwhile | Compare usable 2K output and live pricing with the same brief |
The hard part of a production Seedance 2.5 API integration is not one request. It is managing model choice, cost, references, asynchronous jobs, callbacks, failures, and fallback routes after launch. EvoLink brings these into one video API and console so teams can test first, integrate second, and route by usable-shot rate and total project cost.
Text-to-video, image-to-video, and reference-to-video share EvoLink authentication, balance, and task infrastructure. Your server stores one EVOLINK_API_KEY and selects the appropriate Seedance 2.5 model ID for each input.
When you also need Seedance 2.0, MiniMax H3, or another video model, you do not have to maintain separate provider accounts, keys, balances, and authentication code. Keep the same task and billing framework and change routes by duration, quality, and use case.
Use a real ad brief, character image, product image, camera reference, and audio asset in Playground before writing your production integration. That is more reliable than judging the model with one demo prompt.
Track usable-shot rate, reruns, and manual rework—not only price per second. Surface character drift, logo deformation, motion blur, reference conflicts, and audio-video sync issues before you lock the route, prompt structure, and acceptance criteria.
EvoLink does not charge a Seedance 2.5 task whose final state is failed. Save the task ID and verify the final status, failure reason, and billing record in the console instead of treating “request created” as “video generated.”
Video generation is asynchronous. Production systems should use polling or a public HTTPS callback, handle missing or duplicate callbacks and timeouts, and retry only after identifying a validation, review, or execution failure.
Product backends can run batch tasks through the EvoLink API, while creative and development teams can ask Codex, Claude, or Gemini to assemble requests, track status, and return results. Both methods share the API key, routes, balance, and task history.
Developers, operators, and content teams can collaborate on one generation foundation instead of maintaining separate accounts and cost records for code and Agent workflows. Copy the Agent prompt on this page, complete the generation goal, and paste it into your Agent.
High-intent questions about availability, model IDs, pricing, limits, model selection, and troubleshooting.
Yes. EvoLink provides text-to-video, image-to-video, and reference-to-video routes for Seedance 2.5. Test the output in Playground, then integrate with the same EvoLink API key.
The model IDs are seedance-2.5-text-to-video, seedance-2.5-image-to-video, and seedance-2.5-reference-to-video. Choose the route by input type and do not send media URLs to the text-to-video route.
Yes. After setting EVOLINK_API_KEY in the local environment, Codex, Claude, or Gemini can choose a model ID, submit the task, poll its status, and return the video. Never place the API key in a prompt or frontend code.
Billing depends on video duration and resolution; video references may also include input duration. Use the live estimate in Pricing and Playground instead of relying on a hard-coded price in the Readme.
No. EvoLink does not charge a task whose final state is failed. Keep the task ID and verify the final status, failure reason, and billing record in the console.
The current EvoLink routes support 4–30 second output at 480p or 720p. Validate composition, motion, and consistency at 480p before moving an approved setup to 720p.
Reference-to-video accepts up to 30 images, 10 videos, and 10 audio tracks, with no more than 50 assets per request. Give each character, product, scene, motion, and audio reference a clear role.
Yes. You can enable generated audio or supply an audio reference in reference-to-video mode. Keep a fixed evaluation set for dialogue, lip sync, and audio-video pacing.
Compare Seedance routes under one EvoLink account and API key, then choose by shot duration, reference workflow, speed, and cost.
This page. For 4–30s shots, multimodal references, and character or product consistency.
A mature Seedance production baseline for shorter shots, multimodal references, and existing 2.0 workflows.
View API
A lightweight, lower-cost Seedance route for drafts, prompt iteration, and frequent batch jobs.
View API
A previous-generation cinematic route for migrating older projects and comparing motion quality.
View APIWhen Seedance 2.5 is not the default, use the same brief to compare resolution, shot duration, audio, motion stability, and total project cost.
For detailed 2K clips of 4–15 seconds; compare its usable-shot rate with Seedance 2.5 using the same brief.
View API
For creative generation, action, and multi-shot video; a production fallback outside the Seedance family.
View API
When a Seedance shot already has usable motion and composition but looks soft or compressed, use Topaz for detail recovery and 1x, 2x, or 4x upscaling.
View APISelect endpoint
All APIs require Bearer Token authentication.
Authorization:
Bearer YOUR_API_KEY/v1/videos/generationsGenerate a 4-30 second Seedance 2.5 video at 480p or 720p with optional synchronized audio.
Processing is asynchronous. Use the returned task ID to query pending, processing, completed, or failed status.
modelstringRequiredDefault: seedance-2.5-text-to-videoFixed value: seedance-2.5-text-to-video
seedance-2.5-text-to-videopromptstringRequiredNon-empty text prompt, up to 10,000 tokens.
A cinematic product film with slow camera movementdurationintegerOptionalDefault: 5Output duration in seconds.
| Value | Description |
|---|---|
| 4-30 | Any integer from 4 through 30 |
| -1 | Automatic: the model picks the best length, billed by actual output |
5qualitystringOptionalDefault: 720pOutput resolution.
| Value | Description |
|---|---|
| 480p | Lower cost |
| 720p | Default |
720paspect_ratiostringOptionalDefault: adaptiveOutput aspect ratio.
| Value | Description |
|---|---|
| adaptive | Select automatically |
| 16:9 | 16:9 |
| 9:16 | 9:16 |
| 1:1 | 1:1 |
| 4:3 | 4:3 |
| 3:4 | 3:4 |
| 21:9 | 21:9 |
adaptivegenerate_audiobooleanOptionalDefault: trueGenerate synchronized audio at no additional video-generation charge.
truecontent_filterbooleanOptionalDefault: trueKeep the standard safety filter enabled. false routes to the relaxed-content channel and adds 10% to generation pricing.
trueoutput_formatstringOptionalDefault: mp4Output container format.
| Value | Description |
|---|---|
| mp4 | Best compatibility (default) |
| mov | yuv444p + PCM, higher color fidelity for editing workflows; browsers may not preview it |
mp4model_params.web_searchbooleanOptionalDefault: falseAllow Text-to-Video to search current web content when needed.
falsecallback_urlstringOptionalOptional HTTPS callback URL for terminal task updates.
https://your-domain.com/webhooks/video{
"model": "seedance-2.5-text-to-video",
"prompt": "A cinematic product film with slow camera movement",
"duration": 5,
"quality": "720p",
"aspect_ratio": "adaptive",
"generate_audio": true,
"content_filter": true
}