Seedance 1.5 Pro Fast (Text-to-Video) converts text prompts into cinematic, live-action-leaning videos with strong prompt adherence, expressive yet stable motion, and consistent aesthetics. It supports 4–12s duration control, multiple aspect ratios (9:16, 1:1, 16:9), and 720p/1080p output with seed-reproducible results—ideal for ads, trailers, and short-drama beats. Built for stable production use with a ready-to-use REST API, no cold starts, and predictable pricing.
Idle
$0.2per run·~50 / $10
ExamplesView all
A candid photograph of a chubby ginger tabby cat deeply relaxed and soaking in a traditional Japanese wooden tub filled with countless floating yellow yuzu fruits. The kitty cat has its eyes closed in bliss, melting into the warm water, with a small white folded towel on its head. Gentle steam rises. Warm, soft natural light filters through a traditional window. Cozy, heartwarming atmosphere, serene. Film grain, highly detailed texture of fur and water.
slow cinematic push-in camera movement, the angle steadily closing in on the subject’s face, eerie stillness, growing tension, ending with the black out
black and white cinematic wide shot of an ancient spartan phalanx standing in perfect formation, hundreds of armored warriors holding long spears, rain falling slowly, mist in the air, dramatic backlight, extreme depth, sharp foreground, blurred background, ultra realistic, epic historical war scene, high contrast, film grain, dramatic shadows, no modern elements
Ultra realistic 8k, A scene from a high-quality animated film, like a work by Makoto Shinkai. In a deep midsummer forest, a train speeds down tracks showered in sunlight filtering through the trees (komorebi). The camera weaves through the trees, chasing the train to emphasize the sense of speed. A girl with her head out the window is bathed in the rapidly changing light and shadow, her hair fluttering in a wind that carries the scent of green. The trees in the background become a green afterimage, vividly highlighting her expression, full of liberation, from moment to moment.
SHOT 13 FINAL ATMOSPHERIC END FRAME Purpose: Lingering dread Prompt: storm clouds rolling slowly over a field of oak trees with spanish moss at dusk, wind bending tall wild flowers, distant silhouette of a ruined church, ominous sky, quiet foreboding, cinematic ending frame
Related Models
README
Seedance V1.5 Pro Text-to-Video Fast
Seedance V1.5 Pro Text-to-Video Fast is ’s production-oriented text-to-video model on WaveSpeedAI. It generates short, cinematic clips from a single natural-language prompt with strong prompt adherence and expressive motion, optimized for fast iteration across common aspect ratios.
Key capabilities
- Text-to-video generation from one prompt for fast concept-to-clip workflows
- Strong prompt adherence for subject, action, environment, lighting, and mood
- Expressive motion with stable aesthetics suited to cinematic short-form outputs
- Aspect ratio options for vertical, square, and widescreen delivery
- Optional audio generation with a simple toggle
- Seed control for reproducible iterations and controlled variations
Parameters
| Parameter | Description |
|---|---|
| prompt* | The positive prompt describing what to generate (subject + action + scene + mood). |
| aspect_ratio | Output aspect ratio: 21:9, 16:9, 4:3, 1:1, 3:4, 9:16. |
| duration | Output duration in seconds (available values depend on the endpoint UI/validator). |
| resolution | Output resolution: 720p or 1080p. |
| generate_audio | Whether to generate audio (true/false). |
| camera_fixed | Whether to lock camera position (true/false). |
| seed | Random seed (-1 for random; set a fixed integer for repeatable results). |
How to use
- Write a clear prompt describing the subject, action, and scene.
- Choose an aspect_ratio that matches your target platform (9:16 for shorts, 16:9 for YouTube, 1:1 for feeds).
- Set duration (start short for iteration, then increase once you like the look).
- Pick resolution:
- 720p for faster drafts
- 1080p for final output detail
- Toggle generate_audio on if you want sound included, or off if you’ll add audio in post.
- Use camera_fixed if you want a locked shot and less framing drift.
- Set seed for reproducible reruns, or keep -1 for fresh variations.
Prompt tips
Write prompts like a director’s brief:
- Subject: who/what is on screen
- Action: what happens next (use clear verbs)
- Scene: where it happens + time + lighting
- Camera: framing and movement (only if needed)
- Style: mood and visual language (optional)
Practical tips:
- Prefer simple, direct sentences first. Add detail only when you need tighter control.
- This workflow works best with positive instructions (describe what you want, not long avoid-lists).
- If you want stronger motion, use intensity words like subtle, energetic, rapid, slow, high energy.
- For multi-step actions, list them in order: walks in → pauses → looks up → smiles.
Pricing
Effective rates
| Resolution | Generate audio | Price per 5 seconds | Price per second |
|---|---|---|---|
| 720p | true | $0.20 | $0.04 |
| 720p | false | $0.10 | $0.02 |
| 1080p | true | $0.30 | $0.06 |
| 1080p | false | $0.15 | $0.03 |
Example costs
| Duration | Resolution | Generate audio | Cost per run |
|---|---|---|---|
| 5s | 720p | true | $0.20 |
| 5s | 720p | false | $0.10 |
| 12s | 720p | true | $0.48 |
| 5s | 1080p | true | $0.30 |
| 5s | 1080p | false | $0.15 |
| 12s | 1080p | true | $0.72 |
Notes
- Start with 720p and shorter duration for quick iteration, then switch to 1080p for finals.
- If framing drifts, try camera_fixed = true and move the action onto the subject instead of the camera.
- Keeping the same seed makes small prompt changes easier to compare.
Related Models
- Seedance V1.5 Pro (Text-to-Video) — Non-fast variant for steadier outputs when speed is less critical.
- Seedance V1 Pro Fast (Text-to-Video) — Fast alternative for rapid previews and lightweight iteration.
- HunyuanVideo-1.5 (Text-to-Video) — Efficient T2V model with strong motion coherence for cost-effective generation.
- Wan 2.5 (Text-to-Video Fast) — Fast T2V option for broad style exploration and high-volume testing.
Seedance v1.5 Pro Text To Video Fast API — Quick start
Grab a WaveSpeedAI API key, then call POST https://api.wavespeed.ai/api/v3/bytedance/seedance-v1.5-pro/text-to-video-fast with your input as JSON. The endpoint returns a prediction id; poll the prediction endpoint until status flips to completed, then read the output URL from data.outputs[0]. Examples for Seedance v1.5 Pro Text To Video Fast below.
HTTP example
# Submit the prediction
curl -X POST "https://api.wavespeed.ai/api/v3/bytedance/seedance-v1.5-pro/text-to-video-fast" \
-H "Content-Type: application/json" \
-H "Authorization: Bearer $WAVESPEED_API_KEY" \
-d '{
"prompt": "A cinematic shot of a city at sunset, soft golden light",
"aspect_ratio": "16:9",
"duration": 5,
"resolution": "720p",
"generate_audio": true,
"camera_fixed": false,
"seed": -1
}'
# Response includes a prediction id. Poll for the result:
curl -X GET "https://api.wavespeed.ai/api/v3/predictions/{request_id}/result" \
-H "Authorization: Bearer $WAVESPEED_API_KEY"
# When status is "completed", read the output from data.outputs[0].Node.js example
// npm install wavespeed
const WaveSpeed = require('wavespeed');
const client = new WaveSpeed(); // reads WAVESPEED_API_KEY from env
const result = await client.run("bytedance/seedance-v1.5-pro/text-to-video-fast", {
"prompt": "A cinematic shot of a city at sunset, soft golden light",
"aspect_ratio": "16:9",
"duration": 5,
"resolution": "720p",
"generate_audio": true,
"camera_fixed": false,
"seed": -1
});
console.log(result.outputs[0]); // → URL of the generated outputPython example
# pip install wavespeed
import wavespeed
output = wavespeed.run(
"bytedance/seedance-v1.5-pro/text-to-video-fast",
{
"prompt": "A cinematic shot of a city at sunset, soft golden light",
"aspect_ratio": "16:9",
"duration": 5,
"resolution": "720p",
"generate_audio": true,
"camera_fixed": false,
"seed": -1
}
)
print(output["outputs"][0]) # → URL of the generated outputSeedance v1.5 Pro Text To Video Fast API — Frequently asked questions
What is the Seedance v1.5 Pro Text To Video Fast API?
Seedance v1.5 Pro Text To Video Fast is a ByteDance model for video generation, exposed as a REST API on WaveSpeedAI. Seedance 1.5 Pro Fast (Text-to-Video) converts text prompts into cinematic, live-action-leaning videos with strong prompt adherence, expressive yet stable motion, and consistent aesthetics. It supports 4–12s duration control, multiple aspect ratios (9:16, 1:1, 16:9), and 720p/1080p output with seed-reproducible results—ideal for ads, trailers, and short-drama beats. Built for stable production use with a ready-to-use REST API, no cold starts, and predictable pricing. You can call it programmatically or try it from the playground above.
How do I call the Seedance v1.5 Pro Text To Video Fast API?
POST your input parameters to the model's REST endpoint (shown in the API tab of this playground) with your WaveSpeedAI API key in the Authorization header. Submission returns a prediction ID; poll the prediction endpoint until status flips to "completed", then read the output URL from the result. The playground generates a ready-to-paste code sample in Python, JavaScript, or cURL for whatever inputs you've set. Full request/response shape is documented at https://wavespeed.ai/docs/docs-api/bytedance/bytedance-seedance-v1.5-pro-text-to-video-fast.
How much does Seedance v1.5 Pro Text To Video Fast cost per run?
Seedance v1.5 Pro Text To Video Fast starts at $0.20 per run. That figure is the base price — the final charge scales with the parameters you set in the form (output size, length, count, references, or whatever knobs this model exposes), so a higher-quality or larger output costs more than a minimal one. The exact cost for your current input is shown live next to the Generate button before you submit, and the actual per-call charge is recorded on the prediction afterwards.
What inputs does Seedance v1.5 Pro Text To Video Fast accept?
Key inputs: `prompt`, `aspect_ratio`, `resolution`, `duration`, `seed`, `camera_fixed`. The full JSON schema (types, defaults, allowed values) is rendered above the Generate button and mirrored in the API reference at https://wavespeed.ai/docs/docs-api/bytedance/bytedance-seedance-v1.5-pro-text-to-video-fast.
How do I get started with the Seedance v1.5 Pro Text To Video Fast API?
Sign up for a free WaveSpeedAI account to claim starter credits, copy your API key from /accesskey, then call the endpoint shown in the API tab of the playground. The playground also auto-generates a code sample in Python, JavaScript, or cURL for the parameters you've set.
Can I use Seedance v1.5 Pro Text To Video Fast outputs commercially?
Commercial usage rights depend on the model's license, set by its provider (ByteDance). The license summary appears on the model card above; see WaveSpeedAI's Terms of Service for platform-level conditions.