> ## Documentation Index
> Fetch the complete documentation index at: https://docs.imagine.art/llms.txt
> Use this file to discover all available pages before exploring further.

# Seedance 2 fast

<div style={{background: "linear-gradient(135deg, #00080f 0%, #001a3a 55%, #000812 100%)", borderRadius: "20px", padding: "3.5rem 3rem 3rem", marginBottom: "2.5rem", overflow: "hidden", position: "relative"}}>
  <div style={{position: "absolute", inset: "0", background: "radial-gradient(ellipse at 30% 70%, rgba(0,100,255,0.18) 0%, transparent 55%), radial-gradient(ellipse at 80% 10%, rgba(124,0,251,0.12) 0%, transparent 50%)", pointerEvents: "none"}} />

  <div style={{position: "relative"}}>
    <div style={{display: "flex", gap: "0.5rem", marginBottom: "1.5rem", flexWrap: "wrap"}}>
      <span style={{background: "rgba(0,80,200,0.3)", border: "1px solid rgba(0,100,255,0.4)", borderRadius: "100px", padding: "0.3rem 1rem", fontSize: "0.72rem", color: "#7eb8ff", fontWeight: "500", letterSpacing: "0.06em"}}>VIDEO MODEL</span>
      <span style={{background: "rgba(255,255,255,0.06)", border: "1px solid rgba(255,255,255,0.12)", borderRadius: "100px", padding: "0.3rem 1rem", fontSize: "0.72rem", color: "rgba(255,255,255,0.45)", fontWeight: "400"}}>by ByteDance</span>
      <span style={{background: "rgba(255,255,255,0.06)", border: "1px solid rgba(255,255,255,0.12)", borderRadius: "100px", padding: "0.3rem 1rem", fontSize: "0.72rem", color: "rgba(255,255,255,0.45)", fontWeight: "400"}}>Seedance 2 family</span>
    </div>

    <h1 style={{fontSize: "clamp(2.5rem, 5vw, 3.75rem)", fontWeight: "700", color: "#ffffff", lineHeight: "1.1", letterSpacing: "-0.025em", margin: "0 0 1.1rem 0"}}>Seedance 2 Fast</h1>
    <p style={{fontSize: "1.1rem", color: "rgba(255,255,255,0.52)", maxWidth: "580px", lineHeight: "1.7", marginBottom: "2.25rem"}}>ByteDance's fast-tier variant of Seedance 2.0 — the same Dual-Branch Diffusion Transformer architecture with native audio-video generation, up to 15 seconds, multimodal references, and significantly lower latency for production and high-volume workflows.</p>

    <div style={{display: "flex", gap: "0.75rem", flexWrap: "wrap"}}>
      <div style={{background: "rgba(255,255,255,0.06)", borderRadius: "14px", padding: "0.875rem 1.5rem", border: "1px solid rgba(255,255,255,0.1)"}}>
        <div style={{fontSize: "0.62rem", color: "rgba(255,255,255,0.32)", textTransform: "uppercase", letterSpacing: "0.1em", marginBottom: "0.3rem"}}>Resolution</div>
        <div style={{fontSize: "1rem", color: "#ffffff", fontWeight: "600"}}>720p</div>
      </div>

      <div style={{background: "rgba(255,255,255,0.06)", borderRadius: "14px", padding: "0.875rem 1.5rem", border: "1px solid rgba(255,255,255,0.1)"}}>
        <div style={{fontSize: "0.62rem", color: "rgba(255,255,255,0.32)", textTransform: "uppercase", letterSpacing: "0.1em", marginBottom: "0.3rem"}}>Duration</div>
        <div style={{fontSize: "1rem", color: "#ffffff", fontWeight: "600"}}>4–15 seconds</div>
      </div>

      <div style={{background: "rgba(255,255,255,0.06)", borderRadius: "14px", padding: "0.875rem 1.5rem", border: "1px solid rgba(255,255,255,0.1)"}}>
        <div style={{fontSize: "0.62rem", color: "rgba(255,255,255,0.32)", textTransform: "uppercase", letterSpacing: "0.1em", marginBottom: "0.3rem"}}>Audio</div>
        <div style={{fontSize: "1rem", color: "#ffffff", fontWeight: "600"}}>Dialogue + SFX + Music</div>
      </div>

      <div style={{background: "rgba(255,255,255,0.06)", borderRadius: "14px", padding: "0.875rem 1.5rem", border: "1px solid rgba(255,255,255,0.1)"}}>
        <div style={{fontSize: "0.62rem", color: "rgba(255,255,255,0.32)", textTransform: "uppercase", letterSpacing: "0.1em", marginBottom: "0.3rem"}}>References</div>
        <div style={{fontSize: "1rem", color: "#ffffff", fontWeight: "600"}}>9 images + 3 video + 3 audio</div>
      </div>
    </div>
  </div>
</div>

<Info>
  Seedance 2 Fast uses the same underlying model as Seedance 2 but is optimized for lower latency. Choose Seedance 2 Fast for rapid iteration and production pipelines where speed matters; choose [Seedance 2](/ai-models/video/seedance-2) when maximum quality is the priority.
</Info>

## Fast-tier Seedance 2

Seedance 2 Fast is ByteDance's production-optimized endpoint for the Seedance 2.0 architecture — released February 10, 2026 alongside the standard model. The underlying Dual-Branch Diffusion Transformer is identical; the Fast variant trades a small margin of peak quality for meaningfully lower inference times, making it the practical choice for iterative workflows, A/B testing, and high-frequency generation pipelines.

Native audio-video joint generation is preserved in the Fast variant — dialogue, sound effects, and music are generated simultaneously with the video, synchronized at the frame level.

## Capabilities

<CardGroup cols={3}>
  <Card title="Native audio-video generation" icon="music">
    Generates dialogue, sound effects, and music synchronized with the video in a single pass — no post-production audio required.
  </Card>

  <Card title="Up to 15 seconds" icon="clock">
    Supports generation lengths from 4 to 15 seconds, covering short social clips through extended narrative sequences.
  </Card>

  <Card title="Multimodal references" icon="images">
    Accepts up to 9 reference images, 3 reference video clips, and 3 audio clips simultaneously for maximum creative direction.
  </Card>

  <Card title="Multi-shot narratives" icon="clapperboard">
    Generates coherent multi-shot sequences from a single prompt — scene transitions, subject consistency, and style maintained across cuts.
  </Card>

  <Card title="Wide aspect ratio support" icon="expand">
    Supports 21:9, 16:9, 4:3, 1:1, 3:4, and 9:16 aspect ratios for any platform or format.
  </Card>

  <Card title="Fast inference" icon="bolt">
    Optimized for lower latency — ideal for rapid iteration, pipeline integrations, and high-volume production.
  </Card>
</CardGroup>

## Specifications

| Feature                  | Details                                    |
| ------------------------ | ------------------------------------------ |
| **Developer**            | ByteDance                                  |
| **Released**             | February 10, 2026                          |
| **Resolution**           | 720p                                       |
| **Duration**             | 4–15 seconds                               |
| **Aspect ratios**        | 21:9, 16:9, 4:3, 1:1, 3:4, 9:16            |
| **Audio**                | Dialogue, SFX, music (native)              |
| **Max reference images** | 9                                          |
| **Max reference videos** | 3                                          |
| **Max reference audio**  | 3                                          |
| **Architecture**         | Dual-Branch Diffusion Transformer (DB-DiT) |

## How to use

<Steps>
  <Step title="Open the AI Video Generator">
    Log into ImagineArt and go to the **AI Video Generator**.
  </Step>

  <Step title="Select Seedance 2 Fast">
    Choose **Seedance 2 Fast** from the model dropdown.
  </Step>

  <Step title="Choose your input mode">
    Select text-to-video, image-to-video, or references mode depending on your creative needs.
  </Step>

  <Step title="Add references (optional)">
    Upload up to 9 reference images, 3 video clips, and 3 audio clips to guide the output style, subject, and sound.
  </Step>

  <Step title="Write your prompt">
    Describe the scene, subjects, motion, camera behavior, and audio atmosphere in your prompt.
  </Step>

  <Step title="Generate">
    Click **Generate**. Seedance 2 Fast will produce a video with synchronized audio faster than the standard variant.
  </Step>
</Steps>

## Prompting tips

* **Describe audio explicitly** — Include what you want to hear: "with the sound of rain pattering on a window and a soft piano melody in the background."
* **Specify camera movement** — "Slow dolly forward," "static wide shot," or "handheld tracking shot" all meaningfully influence the output.
* **Use reference audio for tone** — Uploading a reference audio clip helps anchor the musical style and ambient mood of the generated video.
* **Keep multi-shot prompts structured** — For sequences, describe each shot with a clear transition cue: "SHOT 1: ... CUT TO SHOT 2: ..."

### Example prompts

> A chef in a professional kitchen carefully plates a dish under warm overhead lighting. Close-up on hands arranging microgreens. Ambient kitchen sounds — sizzling pans, light chatter in the background. Cinematic, handheld camera.

> A timelapse of a city square from empty early morning through bustling midday. Wide establishing shot. Birds chirping at dawn, building to the hum of traffic and crowd noise by noon.

## Compare models

| Model                                                   | Speed    | Max duration | Audio           | References              | Best for                        |
| ------------------------------------------------------- | -------- | ------------ | --------------- | ----------------------- | ------------------------------- |
| **Seedance 2 Fast**                                     | Fast     | 15s          | Native          | 9 img + 3 vid + 3 audio | Production pipelines, iteration |
| [Seedance 2](/ai-models/video/seedance-2)               | Standard | 15s          | Native          | 9 img + 3 vid + 3 audio | Maximum quality output          |
| [Seedance 1.5 Pro](/ai-models/video/seedance-1-5-pro)   | Standard | 12s          | Native lip-sync | Image input             | Dialogue, multilingual          |
| [Seedance Pro Fast](/ai-models/video/seedance-pro-fast) | Fast     | 10s          | No              | Image input             | Quick clips without audio       |

<Tip>
  If your workflow requires high throughput or rapid iteration, Seedance 2 Fast is the right default. Switch to the standard [Seedance 2](/ai-models/video/seedance-2) when you need the absolute best quality for a final deliverable.
</Tip>