Seedance 2.5 Fast API
Seedance 2.5 on dedicated, faster compute: your renders start straight away on capacity kept for this model instead of queueing behind shared traffic, so each video comes back sooner and large batches run side by side. 480p, 720p and 1080p, up to 30 seconds with sound, reference images and audio, and first and last frames.
Pricing per second of video
| Resolution | Per second |
|---|---|
| 480p | $0.10lowest10 credits |
| 720p | $0.24524.5 credits |
| 1080p | $0.5555 credits |
| 480p + with video input | $0.066 credits |
| 720p + with video input | $0.1515 credits |
| 1080p + with video input | $0.3434 credits |
Billed in credits per second of video (100 credits = $1, rounded up to a whole credit). Charged once, only for the route that succeeds. Failed attempts cost $0.00.
Request
# One Idempotency-Key per request, made once and sent again with every resend of it
KEY=$(uuidgen)
# 1. Submit. max_cost_usd is your cap: the most this may cost (it lists at $0.98).
# No id after a timeout, a 429 or a 5xx? Run step 1 again: the same $KEY never makes a second one.
RESP=$(curl -s https://api.revana.si/v1/generations \
-H "Authorization: Bearer $REVANA_API_KEY" \
-H "Content-Type: application/json" \
-H "Idempotency-Key: $KEY" \
-d '{
"model": "seedance-2.5-fast",
"input": {
"prompt": "A slow dolly shot through a neon-lit night market in the rain, steam rising from food stalls",
"resolution": "720p",
"duration": 4,
"aspect_ratio": "16:9",
"audio": true
},
"max_cost_usd": 1.5
}')
ID=$(echo "$RESP" | jq -r '.id // empty')
echo "${ID:-no id: ${RESP:-no answer}}"
# 2. Poll it until status is "succeeded" or "failed". A failed one is free; to try it again,
# make a new key first (KEY=$(uuidgen)): the old one answers with the failure.
curl -s https://api.revana.si/v1/generations/${ID:?no id from step 1} \
-H "Authorization: Bearer $REVANA_API_KEY"
# 3. Download the file once it has succeeded
curl -L https://api.revana.si/v1/generations/${ID:?no id from step 1}/content \
-H "Authorization: Bearer $REVANA_API_KEY" \
-o out.mp4Set REVANA_API_KEY to your key. Full reference in the quickstart.
Options
seedance-2.5-fast3 routes
Every request starts on the cheapest route. If it fails, the job moves to the next one automatically.
About the Seedance 2.5 Fast API
How much does the Seedance 2.5 Fast API cost?
Seedance 2.5 Fast costs from $0.10 per second of video on Revana (480p: $0.10; 720p: $0.245; 1080p: $0.55; 480p + with video input: $0.06; 720p + with video input: $0.15; 1080p + with video input: $0.34). You pay in prepaid credits, 100 credits to the dollar, with no subscription or monthly minimum. A generation that fails costs nothing.
How do I call Seedance 2.5 Fast from code?
Send POST https://api.revana.si/v1/generations with {"model": "seedance-2.5-fast", "input": {...}} and your Revana API key as a Bearer token, poll GET /v1/generations/{id} until it succeeds, then download GET /v1/generations/{id}/content. Every model on Revana takes the same request shape.
What happens if a Seedance 2.5 Fast generation fails?
Revana has 3 routes for Seedance 2.5 Fast. A job starts on the cheapest and moves to the next automatically if one fails. You are charged once, only for the route that delivers. A failed generation costs $0.00.
What can Seedance 2.5 Fast do on Revana?
Seedance 2.5 Fast supports text to video, image to video, first + last frame, reference to video and video to video, resolutions 480p, 720p, 1080p, durations 4 to 30 seconds, aspect ratios 16:9, 9:16, 1:1, 4:3, 3:4, 21:9, adaptive, generated audio and up to 30 input images. A value it does not offer is refused with 422 before anything is charged.
Can my AI agent use Seedance 2.5 Fast?
Yes. Connect the Revana MCP server (https://revana.si/api/mcp) to Claude, ChatGPT, Cursor or Codex, or have the agent call the REST API. The agent can list models, get a free quote and generate on your credits.
Compare with similar models
- Seedance 2.5 ByteDance, from $0.09 per second of video
- Seedance 2.0 ByteDance, from $0.08 per second of video
- Seedream 5.5 ByteDance, from $0.02 per image
- Seedream 4.5 ByteDance, from $0.04 per image
- Seedream 5.0 Pro ByteDance, from $0.04 per image
- ByteDance Lip Sync ByteDance, from $0.05 per second of video
Also as markdown for agents. Every model and price: models.json.