bytedance/seedance-2.0

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ByteDance's multimodal video generation model with native audio, multimodal reference inputs, and intelligent duration control.

Capabilities

Reference ImagesSeed

Cost

Community model (estimated from hardware time)

Input Parameters

Name	Type	Description	Default	Constraints
`prompt`*	string	Text prompt for video generation. Maximum 4000 characters. BytePlus recommends keeping prompts under 600 English words for best results.	`—`	—
`aspect_ratio`	string	Video aspect ratio. Set to 'adaptive' to let the model choose the best ratio based on inputs.	`"16:9"`	16:94:31:13:49:1621:99:21adaptive
`duration`	integer	Video duration in seconds. Set to -1 for intelligent duration (model picks the best length).	`5`	min: -1, max: 15
`generate_audio`	boolean	Generate synchronized audio with the video, including dialogue (use double quotes in prompt), sound effects, and background music.	`true`	—
`image`	string(uri)	Input image for image-to-video generation (first frame). Cannot be combined with reference images.	`—`	—
`last_frame_image`	string(uri)	Input image for last frame generation. Only works if a first frame image is also provided. Cannot be combined with reference images.	`—`	—
`reference_audios`	array	Reference audio files (up to 3, total duration max 15s) for audio-driven generation and lip-sync. Requires at least one reference image or video. Reference them in your prompt as [Audio1], [Audio2], etc.		—
`reference_images`	array	Reference images (up to 9) for character consistency, style guidance, and scene composition. Cannot be used together with first/last frame images. You can reference them in your prompt as [Image1], [Image2], etc.		—
`reference_videos`	array	Reference videos (up to 3, total duration max 15s) for motion transfer, style reference, and editing. Reference them in your prompt as [Video1], [Video2], etc.		—
`resolution`	string	Video resolution. 4K outputs 10-bit H.265/HEVC at high bitrate.	`"720p"`	480p720p1080p4k
`seed`	integer	Random seed. Set for reproducible generation.	`—`	—

promptrequiredstring

Text prompt for video generation. Maximum 4000 characters. BytePlus recommends keeping prompts under 600 English words for best results.

aspect_ratiostring

Video aspect ratio. Set to 'adaptive' to let the model choose the best ratio based on inputs.

Default: "16:9"

16:94:31:13:49:1621:99:21adaptive

durationinteger

Video duration in seconds. Set to -1 for intelligent duration (model picks the best length).

Default: 5min: -1, max: 15

generate_audioboolean

Generate synchronized audio with the video, including dialogue (use double quotes in prompt), sound effects, and background music.

Default: true

imagestring

Input image for image-to-video generation (first frame). Cannot be combined with reference images.

last_frame_imagestring

Input image for last frame generation. Only works if a first frame image is also provided. Cannot be combined with reference images.

reference_audiosarray

Reference audio files (up to 3, total duration max 15s) for audio-driven generation and lip-sync. Requires at least one reference image or video. Reference them in your prompt as [Audio1], [Audio2], etc.

Default:

reference_imagesarray

Reference images (up to 9) for character consistency, style guidance, and scene composition. Cannot be used together with first/last frame images. You can reference them in your prompt as [Image1], [Image2], etc.

Default:

reference_videosarray

Reference videos (up to 3, total duration max 15s) for motion transfer, style reference, and editing. Reference them in your prompt as [Video1], [Video2], etc.

Default:

resolutionstring

Video resolution. 4K outputs 10-bit H.265/HEVC at high bitrate.

Default: "720p"

480p720p1080p4k

seedinteger

Random seed. Set for reproducible generation.

Version: a6dcbae88b15Updated: 8/12/2026872.5K runs