Seedance 1.5 Pro overview
Seedance 1.5 Pro by ByteDance
Enjoy optimized performance across resolutions and formats, from prototypes to production-grade outputs.
Seedance 1.5 Pro specs
- Model ID
bytedance/seedance-1-5-pro- Developer
- ByteDance
- Input
- Text
- Output
- Video
- Endpoint
POST https://api.aimlapi.com/v2/video/generations
What Is Seedance 1.5 Pro?
Most AI video tools operate in two steps: generate the visual, then stitch in audio afterward. That two-step process is why so much AI-generated content looks and sounds slightly off, the sound effects land a beat late, lips don't quite match words, and ambient noise feels pasted in.
Seedance 1.5 Pro takes a different approach entirely. Developed by ByteDance's Seed team and published in December 2025, it is a foundational model built from the ground up for native, joint audio-video generation. Audio and video aren't added to each other, they're created together, sharing the same generation process, the same attention layers, the same loss functions.
The result is millisecond-level synchronization between what you see and what you hear: lips that move in precise time with spoken words, ambient sounds that materialize exactly when objects collide on screen, background music that breathes with the pacing of the shot.
What Seedance 1.5 Pro Can Do
Six capabilities that set this model apart from every other video generation API on the market today.
Native Audio-Video Joint Generation
Ambient sounds, action effects, background music, and human voices are generated simultaneously with the video frames, not appended afterward. The dual-branch Diffusion Transformer processes both modalities in parallel, synchronized at the architectural level.
Multilingual Lip-Sync with Dialect Support
The model understands phonemes, the individual sounds that make up speech, and maps them correctly to lip shapes in real time. This works across English, Mandarin, Japanese, Korean, Spanish, Indonesian, Cantonese, Shanxi dialect, and Sichuan dialect, with each language's natural rhythm preserved.
Cinematic Camera Control
Specify professional camera movements directly in your prompt: dolly zooms, Hitchcock effects, crane movements, tracking shots, whip pans, and orbits. The model processes compositional language, golden hour lighting, rack focus, shallow depth of field and executes it accurately across the generated clip.
Film-Grade Emotional Performance
Subtle micro-expressions, a slight swallow, eyes widening, anxiety transitioning to relief, are rendered accurately based on the prompt context and image input. This removes the mechanical stiffness common in AI video. Characters behave, not just move.
Use cases
Film and television production is a documented use case, with the model described as supporting seamless audio-visual fusion across film and TV workflows.
Short-form drama generation is another stated use case, with documentation citing its suitability for narrative expression and dialogue-driven creative output.
Advertising content creation is explicitly listed, including ad-focused creative workflows that benefit from synchronized audio and visuals.
Opera performances are also named as a scenario where the model’s audio-visual capabilities are suited to expressive performance content.
Seedance 1.5 Pro API pricing
| Usage | Price | Unit |
|---|---|---|
| Output | $1.2 | 1M tokens |
Prices from the AI/ML API price list, checked on Nov 4, 2026.
How to use the Seedance 1.5 Pro API
View docs
Build with your agent
Give your agent the model details, code and documentation.
1Get your API key
Create API keyexport AIMLAPI_KEY="8f2b4c7d9a1e6b3f…"2Make your first request
curl 'https://api.aimlapi.com/v2/video/generations' \
-H "Authorization: Bearer $AIMLAPI_KEY" \
-H 'Content-Type: application/json' \
-d '{
"model": "bytedance/seedance-1-5-pro",
"prompt": "A slow dolly shot through a sunlit greenhouse full of ferns, light dust in the air, natural camera motion"
}'import os
import requests
headers = {
"Authorization": f"Bearer {os.environ['AIMLAPI_KEY']}",
"Content-Type": "application/json",
}
payload = {
"model": "bytedance/seedance-1-5-pro",
"prompt": "A slow dolly shot through a sunlit greenhouse full of ferns, light dust in the air, natural camera motion"
}
response = requests.post("https://api.aimlapi.com/v2/video/generations", headers=headers, json=payload, timeout=120)
response.raise_for_status()
print(response.json())const response = await fetch("https://api.aimlapi.com/v2/video/generations", {
method: "POST",
headers: {
Authorization: `Bearer ${process.env.AIMLAPI_KEY}`,
"Content-Type": "application/json",
},
body: JSON.stringify({
"model": "bytedance/seedance-1-5-pro",
"prompt": "A slow dolly shot through a sunlit greenhouse full of ferns, light dust in the air, natural camera motion"
}),
});
if (!response.ok) throw new Error(`HTTP ${response.status}`);
console.log(await response.json());The request returns a generation id. Poll GET https://api.aimlapi.com/v2/video/generations?generation_id=<id> until the status is completed.
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Seedance 1.5 Pro FAQ
What inputs and outputs does Seedance 1.5 Pro support?
Seedance 1.5 Pro takes image, text, video as input and returns video.
How is Seedance 1.5 Pro billed?
Seedance 1.5 Pro is billed per generation, a fixed charge per output rather than by prompt length.
Can Seedance 1.5 Pro take an existing image as input?
Yes, Seedance 1.5 Pro accepts image input as well as a text prompt.
Who created Seedance 1.5 Pro?
Seedance 1.5 Pro was built by ByteDance.
How do I call Seedance 1.5 Pro on AI/ML API?
Use bytedance/seedance-1-5-pro as the model id on AI/ML API.
Is Seedance 1.5 Pro available through a single API key?
Yes. Seedance 1.5 Pro is served through AI/ML API, so the same key and endpoint format used for other models applies.
Does Seedance 1.5 Pro produce images as well as video?
No, its output modality is video only, even though it can accept image, text, or video as input.
What is the Seedance 1.5 Pro model ID?
Use bytedance/seedance-1-5-pro as the model parameter. Requests go to https://api.aimlapi.com/v2/video/generations with your AI/ML API key.