> ## 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 1 5 pro

<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 25% 65%, rgba(0,100,255,0.18) 0%, transparent 55%), radial-gradient(ellipse at 80% 15%, 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 1 family</span>
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    <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 1.5 Pro</h1>
    <p style={{fontSize: "1.1rem", color: "rgba(255,255,255,0.52)", maxWidth: "580px", lineHeight: "1.7", marginBottom: "2.25rem"}}>ByteDance's 4.5-billion-parameter video model — millisecond-precision lip-sync, native support for 8+ languages including English, Mandarin, Japanese, Korean, and Spanish, up to 1080p resolution, and 10× faster inference than its predecessor.</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"}}>Parameters</div>
        <div style={{fontSize: "1rem", color: "#ffffff", fontWeight: "600"}}>4.5 Billion</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"}}>Resolution</div>
        <div style={{fontSize: "1rem", color: "#ffffff", fontWeight: "600"}}>Up to 1080p</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"}}>Languages</div>
        <div style={{fontSize: "1rem", color: "#ffffff", fontWeight: "600"}}>8+ languages</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"}}>Inference</div>
        <div style={{fontSize: "1rem", color: "#ffffff", fontWeight: "600"}}>10× faster</div>
      </div>
    </div>
  </div>
</div>

## Built for multilingual dialogue and lip-sync

Seedance 1.5 Pro is ByteDance's purpose-built model for dialogue-heavy and multilingual video content. The 4.5-billion-parameter Dual-Branch Diffusion Transformer (DB-DiT) architecture achieves millisecond-precision lip-sync — character mouth movements align exactly with the audio, across 8 languages and regional dialects including English, Mandarin, Japanese, Korean, Spanish, Portuguese, Indonesian, and Cantonese.

At 10× faster inference than its predecessor, Seedance 1.5 Pro is viable for production workflows that require consistent talking-head or dialogue-scene generation at scale.

## Capabilities

<CardGroup cols={3}>
  <Card title="Millisecond-precision lip-sync" icon="waveform">
    Character lip movements align precisely with generated audio at the millisecond level — across 8 languages and regional dialects.
  </Card>

  <Card title="8+ language support" icon="globe">
    Native dialogue generation in English, Mandarin, Japanese, Korean, Spanish, Portuguese, Indonesian, Cantonese, and Sichuanese.
  </Card>

  <Card title="4.5B parameters" icon="microchip">
    A 4.5-billion-parameter Dual-Branch Diffusion Transformer — capable of nuanced character expressions, complex scene compositions, and consistent identity.
  </Card>

  <Card title="Up to 1080p resolution" icon="expand">
    Full HD output for production-ready talking-head videos, interviews, and dialogue-driven scenes.
  </Card>

  <Card title="10× faster inference" icon="bolt">
    Runs 10× faster than the previous generation — practical for batch content creation and localized video production pipelines.
  </Card>

  <Card title="Character consistency" icon="user">
    Maintains subject appearance, expression nuance, and visual identity across scenes within a generation.
  </Card>
</CardGroup>

## Specifications

| Feature             | Details                                                                                     |
| ------------------- | ------------------------------------------------------------------------------------------- |
| **Developer**       | ByteDance                                                                                   |
| **Parameters**      | 4.5 billion                                                                                 |
| **Architecture**    | Dual-Branch Diffusion Transformer (DB-DiT)                                                  |
| **Resolution**      | Up to 1080p                                                                                 |
| **Duration**        | 4–12 seconds                                                                                |
| **Languages**       | English, Mandarin, Japanese, Korean, Spanish, Portuguese, Indonesian, Cantonese, Sichuanese |
| **Lip-sync**        | Millisecond-precision                                                                       |
| **Audio**           | Native dialogue with lip-sync                                                               |
| **Inference speed** | 10× faster than predecessor                                                                 |

## 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 1.5 Pro">
    Choose **Seedance 1.5 Pro** from the model dropdown.
  </Step>

  <Step title="Upload a reference image">
    For talking-head or character dialogue scenes, upload a reference image of the character whose lips you want to animate.
  </Step>

  <Step title="Write your prompt">
    Describe the dialogue scene, specify the language if relevant, and include any visual context — setting, lighting, emotion.
  </Step>

  <Step title="Set duration and resolution">
    Choose your clip length (up to 12 seconds) and resolution (up to 1080p).
  </Step>

  <Step title="Generate">
    Click **Generate**. Seedance 1.5 Pro produces the video with synchronized dialogue and lip movement.
  </Step>
</Steps>

## Prompting tips

* **Specify the language explicitly** — "A character speaking in formal Japanese" or "conversational Cantonese dialogue" helps the model produce accurate phoneme-to-mouth mapping.
* **Describe emotional tone** — "Excited," "calm and measured," "whispering urgently" all influence both the audio generation and facial expressions.
* **Use a clear reference image** — For best lip-sync accuracy, use a front-facing or slightly angled reference image where the character's mouth is clearly visible.
* **Keep dialogue clips concise** — For maximum coherence, target 5–8 second clips per generation and stitch together longer sequences.

### Example prompts

> A news anchor speaks directly to camera in formal English. Well-lit studio background, professional broadcast style, neutral expression. 8 seconds, 1080p.

> A young woman laughs and responds excitedly in Mandarin during a casual conversation. Warm indoor lighting, natural expressions, slight camera movement. 6 seconds.

## Compare models

| Model                                           | Lip-sync              | Languages    | Resolution | Best for                            |
| ----------------------------------------------- | --------------------- | ------------ | ---------- | ----------------------------------- |
| **Seedance 1.5 Pro**                            | Millisecond precision | 8+           | 1080p      | Multilingual dialogue, talking-head |
| [Seedance 2](/ai-models/video/seedance-2)       | Native                | —            | 720p       | Multi-reference, full multimodal    |
| [Wan 2.5](/ai-models/video/wan-2-5)             | Yes                   | Limited      | 1080p      | Audio-synced general content        |
| [Kling 2.6 Pro](/ai-models/video/kling-2-6-pro) | Yes                   | EN + Chinese | 1080p      | EN/Chinese audio-synced production  |

<Tip>
  Seedance 1.5 Pro is the strongest model for multilingual dialogue content and precise lip-sync across non-English languages. For full multimodal production with video and audio references, step up to [Seedance 2](/ai-models/video/seedance-2).
</Tip>