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Seedance 2.5

Model Information

Display Name: Seedance 2.5

API Model ID: bytedance/seedance-2.5

Category: Image To Video

Description: Seedance 2.5 is ByteDance's latest video generation model, built for long-form storytelling and multimodal reference-based generation. It supports first-frame and first-and-last-frame control, reference-guided generation from many assets, optional generated audio, and clips up to 30 seconds long. **Key Features:** - Text-to-video and image-to-video generation - First frame and first-and-last frame control - Multimodal reference-to-video (up to 50 image/video/audio references upstream) - Long clips: 4-30 seconds in a single generation - Optional synchronized, multilingual audio generation - 480p and 720p output - 6 aspect ratios (16:9, 9:16, 1:1, 4:3, 3:4, 21:9) **Capabilities:** - Long-form narrative video generation - Image-to-video animation - Start/end frame interpolation - Reference-guided generation (characters, style, composition) - Native audiovisual generation **Best For:** - Story-driven clips and multi-scene sequences - Character-consistent content across shots - Ads, trailers, and explainer videos with audio - Longer social/short-film content (up to 30s) **Output Options:** - Resolution: 480p, 720p - Aspect Ratios: 16:9, 9:16, 1:1, 4:3, 3:4, 21:9 - Duration: 4-30 seconds - Audio: Optional (generate_audio) **Pricing Tiers (per second):** - 480p: $0.162/s - 720p: $0.349/s **Technical Specs:** - Model ID: bytedance/seedance-2.5 - Input: Text prompt, up to 2 frame images (first/last) or reference images - Output: MP4 video (optionally with audio) - API: OpenRouter Video API (async, polled by the gateway)

How to Use This Model

To use Seedance 2.5 via the HInow.ai API, use the model ID: bytedance/seedance-2.5

API Request Example (Image Generation)


POST https://api.hinow.ai/v1/images
Authorization: Bearer YOUR_API_KEY
Content-Type: application/json

{
  "model": "bytedance/seedance-2.5",
  "prompt": "Your image description here"
}

Pricing

  • total: $0.162

Available Parameters

  • duration: Video duration in seconds (4-30). Default: 5 (Options: 4, 5, 6, 8, 10, 12, 15, 20, 25, 30)
  • resolution: Output video resolution. Default: 720p (Options: 480p, 720p)
  • aspect_ratio: Output video aspect ratio. Default: 16:9 (Options: 16:9, 9:16, 1:1, 4:3, 3:4, 21:9)
  • generate_audio: Generate synchronized audio with the video. Default: true (Options: true, false)
  • image_mode: How images[] are used. frames: images[0] = first frame, images[1] = last frame. reference: all images guide style/subject. auto: 1-2 images = frames, 3+ = reference. Default: auto (Options: auto, frames, reference)
  • seed: Seed for reproducible generation (best effort)

Quick Reference

To use this model, set: "model": "bytedance/seedance-2.5"

Featured: No

Documentation: https://hinow.ai/models/bytedance/seedance-2.5

API Endpoint: https://api.hinow.ai/v1

Back to Models

Seedance 2.5

bytedance/seedance-2.5

$0.162
per second

About

Seedance 2.5 is ByteDance's latest video generation model, built for long-form storytelling and multimodal reference-based generation. It supports first-frame and first-and-last-frame control, reference-guided generation from many assets, optional generated audio, and clips up to 30 seconds long.

Key Features:

  • Text-to-video and image-to-video generation
  • First frame and first-and-last frame control
  • Multimodal reference-to-video (up to 50 image/video/audio references upstream)
  • Long clips: 4-30 seconds in a single generation
  • Optional synchronized, multilingual audio generation
  • 480p and 720p output
  • 6 aspect ratios (16:9, 9:16, 1:1, 4:3, 3:4, 21:9)

Capabilities:

  • Long-form narrative video generation
  • Image-to-video animation
  • Start/end frame interpolation
  • Reference-guided generation (characters, style, composition)
  • Native audiovisual generation

Best For:

  • Story-driven clips and multi-scene sequences
  • Character-consistent content across shots
  • Ads, trailers, and explainer videos with audio
  • Longer social/short-film content (up to 30s)

Output Options:

  • Resolution: 480p, 720p
  • Aspect Ratios: 16:9, 9:16, 1:1, 4:3, 3:4, 21:9
  • Duration: 4-30 seconds
  • Audio: Optional (generate_audio)

Pricing Tiers (per second):

  • 480p: $0.162/s
  • 720p: $0.349/s

Technical Specs:

  • Model ID: bytedance/seedance-2.5
  • Input: Text prompt, up to 2 frame images (first/last) or reference images
  • Output: MP4 video (optionally with audio)
  • API: OpenRouter Video API (async, polled by the gateway)

Capabilities

Image To VideoText To Video

Parameters

duration

Video duration in seconds (4-30). Default: 5

4568101215202530
resolution

Output video resolution. Default: 720p

480p720p
aspect_ratio

Output video aspect ratio. Default: 16:9

16:99:161:14:33:421:9
generate_audio

Generate synchronized audio with the video. Default: true

truefalse
image_mode

How images[] are used. frames: images[0] = first frame, images[1] = last frame. reference: all images guide style/subject. auto: 1-2 images = frames, 3+ = reference. Default: auto

autoframesreference
seed

Seed for reproducible generation (best effort)

Code Examples

curl -X POST https://api.hinow.ai/v1/videos \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer $HINOW_API_KEY" \
  -d '{
    "model": "bytedance/seedance-2.5",
    "prompt": "A cat playing with a ball",
    "images": ["https://example.com/image.jpg"],
    "parameters": {
      "duration": "4",
      "resolution": "480p",
      "aspect_ratio": "16:9",
      "generate_audio": "true",
      "image_mode": "auto",
      "seed": ""
    }
  }'