bytedance/seedream-3

A text-to-image model with support for native high-resolution (2K) image generation

Capabilities

1:1 4:3 3:4 16:9 9:16 2:3 3:2 Seed

Cost

Community model (estimated from hardware time)

Input Parameters

Name	Type	Description	Default	Constraints
`prompt` *	string	Text prompt for image generation	`—`	—
`aspect_ratio`	string	Image aspect ratio. Set to 'custom' to specify width and height.	`"16:9"`	1:1 3:4 4:3 16:9 9:16 2:3 3:2 21:9 custom
`guidance_scale`	number	Prompt adherence. Higher = more literal.	`2.5`	min: 1, max: 10
`height`	integer	Image height	`2048`	min: 512, max: 2048
`seed`	integer	Random seed. Set for reproducible generation	`—`	—
`size`	string	Big images will have their longest dimension be 2048px. Small images will have their shortest dimension be 512px. Regular images will always be 1 megapixel. Ignored if aspect ratio is custom.	`"regular"`	small regular big
`width`	integer	Image width	`2048`	min: 512, max: 2048

prompt required string

Text prompt for image generation

aspect_ratio string

Image aspect ratio. Set to 'custom' to specify width and height.

Default: "16:9"

1:1 3:4 4:3 16:9 9:16 2:3 3:2 21:9 custom

guidance_scale number

Prompt adherence. Higher = more literal.

Default: 2.5 min: 1, max: 10

height integer

Image height

Default: 2048 min: 512, max: 2048

seed integer

Random seed. Set for reproducible generation

size string

Big images will have their longest dimension be 2048px. Small images will have their shortest dimension be 512px. Regular images will always be 1 megapixel. Ignored if aspect ratio is custom.

Default: "regular"

small regular big

width integer

Image width

Default: 2048 min: 512, max: 2048

Version: ed344813bc9f Updated: 2/26/2026 3.3M runs