google/imagen-3-fast

A faster and cheaper Imagen 3 model, for when price or speed are more important than final image quality

Capabilities

No capability data available

Cost

Community model (estimated from hardware time)

Input Parameters

Name	Type	Description	Default	Constraints
`prompt` *	string	Text prompt for image generation	`—`	—
`aspect_ratio`	string	Aspect ratio of the generated image	`"1:1"`	1:1 9:16 16:9 3:4 4:3
`output_format`	string	Format of the output image	`"jpg"`	jpg png
`safety_filter_level`	string	block_low_and_above is strictest, block_medium_and_above blocks some prompts, block_only_high is most permissive but some prompts will still be blocked	`"block_only_high"`	block_low_and_above block_medium_and_above block_only_high

prompt required string

Text prompt for image generation

aspect_ratio string

Aspect ratio of the generated image

Default: "1:1"

1:1 9:16 16:9 3:4 4:3

output_format string

Format of the output image

Default: "jpg"

jpg png

safety_filter_level string

block_low_and_above is strictest, block_medium_and_above blocks some prompts, block_only_high is most permissive but some prompts will still be blocked

Default: "block_only_high"

block_low_and_above block_medium_and_above block_only_high

Version: 2d1d7f7965a9 Updated: 2/26/2026 565.9K runs