A still product shot becomes a hero video reel through the Seedance 2.0 Fast API in under a minute — we replaced our entire B-roll vendor pipeline.
The Seedance 2.0 Fast API animates a still image into a 720p video clip with natural-language prompts (ByteDance Doubao-Seedance 2.0 Fast). The Seedance 2.0 Fast API supports 4-to-15-second outputs with a first-frame seed image, native synchronized audio, multi-shot composition, and cinematic camera motion — all through one REST endpoint, metered per second at 15% below ByteDance's official rate.
Input
The text prompt sent to the model
Output
SampleRun the model to replace this previewSeedance 2.0 Fast API: Image to Video
Use the Seedance 2.0 Fast API to animate a still image into a 720p video with native audio.
The Seedance 2.0 Fast API animates a still image into a 720p video clip from a natural-language prompt (ByteDance Doubao-Seedance 2.0 Fast). The Seedance 2.0 Fast API renders 4-to-15-second clips with a first-frame seed image, native synchronized audio, multi-shot composition, and cinematic camera motion — all through one REST endpoint.
The Seedance 2.0 Fast API is metered per second at a 15% discount to the official rate: $0.238/s at 720p (720p only) — $1.19 per 5-second clip, $2.38 at 10s. One RouterBase key works across the Seedance 2.0 Fast API and 200+ other models — no provider-specific SDK.
Six reasons teams ship on the Seedance 2.0 Fast API
From first-frame seed to native audio — what the Seedance 2.0 Fast API gets right.
Image-driven motion
Pass a still image plus a natural-language prompt; the Seedance 2.0 Fast API animates it into a 4-to-15-second clip — no storyboard, no timeline editing.
Native synchronized audio
The Seedance 2.0 Fast API generates matching audio in the same call — ambience, effects, and motion-synced sound — no separate TTS or foley pass.
720p output
The Seedance 2.0 Fast API renders at 720p only — the Fast tier trades 1080p for higher speed and lower cost. Billed per second.
Multi-shot composition
The Seedance 2.0 Fast API can stage multi-shot sequences with coherent subjects and cinematic camera movement across cuts.
One key, 200+ models
One RouterBase key covers the Seedance 2.0 Fast API and 200+ other models — OpenAI-compatible, no provider-specific SDK.
Metered per second
The Seedance 2.0 Fast API charges per second at a 15% discount — $0.238/s at 720p (720p only). Pay only for the seconds you render.
Quickstart
Get started with the Seedance 2.0 Fast API in 3 steps
From sign-up to your first Seedance 2.0 Fast API call in under 5 minutes.
Create a RouterBase API key
Sign up and generate sk-rb-… — one key works across the Seedance 2.0 Fast API and 200+ other models on RouterBase.
POST the base image
Send the still image plus prompt, duration, and resolution in JSON to the Seedance 2.0 Fast API endpoint. The call is async — RouterBase polls upstream until the render completes, then returns a signed URL.
Inspect the result
Each Seedance 2.0 Fast API response includes generation metadata for auditing and a render URL ready to embed in your product.
Pay only for what you use
RouterBase passes through partner-tier pricing. Compared against the model's official published API rate.
| Size | 720p |
|---|---|
| 4s | $0.952 |
| 5s | $1.190 |
| 8s | $1.904 |
| 10s | $2.380 |
Your request will cost $1.190 per run (5s / 720p).With $1 you can run this model approximately 1 times.
Official price = ByteDance Doubao-Seedance 2.0 Fast list rate ($0.28/s at 720p, 720p only). The Seedance 2.0 Fast API on RouterBase applies a 15% discount on every generation — $0.238/s at 720p.
What teams build with the Seedance 2.0 Fast API
Real production loads running on the RouterBase model catalog across 200+ models.
We swapped three providers through RouterBase in one line of code when OpenAI had its outage. Our users never noticed.
The Seedance 2.0 Fast API returns native synchronized audio in the same call — we removed a whole audio post-step from our pipeline.
RouterBase puts 200+ models behind one key. Our team stopped opening provider accounts — the Seedance 2.0 Fast API was just there.
Per-second pricing on the Seedance 2.0 Fast API means we pay only for the seconds we render — cleaner budgeting than per-clip.
We pointed our existing OpenAI SDK at RouterBase with one base-URL swap and the Seedance 2.0 Fast API just worked.
Frequently Asked Questions
Common questions about the Seedance 2.0 Fast API.
The Seedance 2.0 Fast API is RouterBase's pass-through to ByteDance Doubao-Seedance 2.0 Fast image-to-video. It animates a still image into a 720p clip from a natural-language prompt — 4-to-15-second durations, first-frame seed, native synchronized audio, multi-shot composition, and cinematic camera motion.