seedinteger
Random seed for reproducible results. Omit or use -1 for a random seed.
Minimum: -1
Maximum: 4294967295
Seedance 2.0 Fast Text to Video
15% OFF
bytedance/seedance/2.0/fast/text-to-videoByteDance's most advanced text-to-video model in its fast tier delivering lower latency and cost without compromising on cinematic output, native audio, multi-shot editing, and director-level camera control for professional-grade video creation.
Try the model
Playground
Input
The text prompt to generate a video from.
Additional Settings More
Customize your input with more control.
Output duration in seconds (4-15), or `auto` to let the model pick a length from the prompt and inputs. `auto` is pre-authorized at 15 seconds and billed on the actual output length. Allowed values: auto, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15.
Output aspect ratio. Defaults to 16:9. Allowed values: 16:9, 9:16, 1:1, 4:3, 3:4.
The resolution of the video to generate. Allowed values: 480p, 720p.
Generate a synchronized audio track. Pricing is the same either way.
Random seed for reproducible results. Omit or use -1 for a random seed. Range: -1 to 4294967295.
ResultExample
What would you like to do next?
Examples
Select an example to load its inputs and result into the playground.
- Open result ↗
Input
{ "aspect_ratio": "16:9", "duration": 5, "prompt": "Photorealistic style: Under a clear blue sky, a vast expanse of white daisy fields stretches out. The camera gradually zooms in and finally fixates on a close-up of a single daisy, with several glistening dewdrops resting on its petals.", "resolution": "720p" }
Seedance 2.0 Fast Text to Video
Seedance 2.0 Fast text-to-video, the lower-latency, lower-cost Seedance 2.0 tier. Write the scene, including dialogue and sound, and get back a 4–15 second clip.
Fields
| Field | Type | Default | Notes |
|---|---|---|---|
prompt | string, required | — | Up to 50,000 characters. |
duration | auto / 4 / 5 / 6 / 7 / 8 / 9 / 10 / 11 / 12 / 13 / 14 / 15 | 5 | Output length in seconds (4–15), or auto to let the model choose. |
aspect_ratio | 16:9 / 9:16 / 1:1 / 4:3 / 3:4 | 16:9 | Output frame shape. |
resolution | 480p / 720p | 720p | Sets the per-second rate. |
generate_audio | boolean | true | Native dialogue, music, and effects. Same price on or off. |
seed | integer -1–4294967295 | random | Fix it to compare prompt changes; -1 is random. |
Billing
You pay for output seconds: $0.10 at 480p, $0.20 at 720p. Audio is included. With duration: "auto" the quote assumes 15 seconds and the final charge uses the generated length.
| Output | 480p | 720p |
|---|---|---|
| 4s | $0.40 | $0.80 |
| 5s (default) | $0.50 | $1.00 |
| 10s | $1.00 | $2.00 |
| 15s | $1.50 | $3.00 |
Failed runs are not charged.
Prompting
- Describe subject, action, camera move, and light in order; add the sound last.
- Quote dialogue and name the speaker.
- For several shots, number them and give each a camera direction.
Limits
- Clips are 4–15 seconds.
Also on SandBase
Other Seedance 2.0 Fast endpoints and tiers: bytedance/seedance/2.0/fast/image-to-video, bytedance/seedance/2.0/fast/reference-to-video, bytedance/seedance/2.5/text-to-video, bytedance/seedance/2.0/text-to-video, bytedance/seedance/2.0/mini/text-to-video.
Start building
Send your first request
Submit this model through the SandBase Unified Run API.
# The quoted heredoc keeps Unicode and shell metacharacters unchanged.
result=$(curl --fail-with-body --silent \
-X POST "https://api.sandbase.ai/v1/run" \
-H "Authorization: Bearer $SANDBASE_API_KEY" \
-H "Content-Type: application/json" \
--data-binary @- <<'SANDBASE_JSON'
{
"model": "bytedance/seedance/2.0/fast/text-to-video",
"prompt": "Photorealistic style: Under a clear blue sky, a vast expanse of white daisy fields stretches out. The camera gradually zooms in and finally fixates on a close-up of a single daisy, with several glistening dewdrops resting on its petals.",
"duration": 5,
"resolution": "720p",
"aspect_ratio": "16:9",
"generate_audio": true
}
SANDBASE_JSON
)
run_id=$(printf '%s' "$result" | jq -r .id)
for attempt in $(seq 1 120); do
status=$(printf '%s' "$result" | jq -r .status)
case "$status" in completed|failed|timeout) break ;; esac
sleep 2
result=$(curl --fail-with-body --silent \
-H "Authorization: Bearer $SANDBASE_API_KEY" \
"https://api.sandbase.ai/v1/run/$run_id")
done
status=$(printf '%s' "$result" | jq -r .status)
[ "$status" = completed ] || { echo "Generation ended: $status" >&2; exit 1; }
printf '%s\n' "$result"2. Authentication
Create a SandBase API key and set it in your server environment. All requests use Bearer authentication.
export SANDBASE_API_KEY="YOUR_API_KEY"Keep the key on your server. Do not expose it in browser code or commit it to a repository.
3. Queue
Submit a request
POST to /v1/run with this model ID and its inputs. The request example above includes submission and polling.
Fetch request status and result
Use the returned run ID to poll until the status is completed, failed or timeout. Read output only after completed.
curl "https://api.sandbase.ai/v1/run/$RUN_ID" \
-H "Authorization: Bearer $SANDBASE_API_KEY"4. Files
Hosted files
Pass a publicly accessible file URL in the model’s image, video or audio field. Supported formats and limits are shown beside each Playground input.
Uploading images
Use the upload or replace control on supported image fields in the Playground. Video URL fields accept a hosted driving video; they do not imply video-upload support.
5. Schema
Input
promptstringrequired
The text prompt to generate a video from.
Default: "Photorealistic style: Under a clear blue sky, a vast expanse of white daisy fields stretches out. The camera gradually zooms in and finally fixates on a close-up of a single daisy, with several glistening dewdrops resting on its petals."
durationvalue
Output duration in seconds (4-15), or `auto` to let the model pick a length from the prompt and inputs. `auto` is pre-authorized at 15 seconds and billed on the actual output length.
Default: 5
Possible values: "auto", 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15
resolutionstring
The resolution of the video to generate.
Default: "720p"
Possible values: "480p", "720p"
aspect_ratiostring
Output aspect ratio. Defaults to 16:9.
Default: "16:9"
Possible values: "16:9", "9:16", "1:1", "4:3", "3:4"
generate_audioboolean
Generate a synchronized audio track. Pricing is the same either way.
Default: true
{
"model": "bytedance/seedance/2.0/fast/text-to-video",
"prompt": "Photorealistic style: Under a clear blue sky, a vast expanse of white daisy fields stretches out. The camera gradually zooms in and finally fixates on a close-up of a single daisy, with several glistening dewdrops resting on its petals.",
"duration": 5,
"resolution": "720p",
"aspect_ratio": "16:9",
"generate_audio": true
}Output
A completed run exposes its result in output. The following is the model’s saved example, not a new generation.
[
{
"poster": "https://static.sandbase.ai/examples/posters/26f77b8bcc87fb12a09d.jpg",
"source": "Self organization completed prediction",
"source_url": "https://www.sandbase.ai/model/bytedance/seedance/2.0/fast/text-to-video",
"url": "https://static.sandbase.ai/examples/203aef95-045d-4c1b-b035-25e6b20901cf/output/9398963a-aed3-4fcb-acc9-cb32f5f00d30.mp4"
}
]