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prunaai/flux-fast
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This is the fastest Flux endpoint in the world.
Capabilities
Seed
Cost
Community model (estimated from hardware time)
Input Parameters
| Name | Type | Description | Default | Constraints |
|---|---|---|---|---|
prompt * | string | Prompt | — | — |
aspect_ratio | string | Aspect ratio of the output image | "1:1" | 1:1 16:9 21:9 3:2 2:3 4:5 5:4 3:4 4:3 9:16 9:21 |
guidance | number | Guidance scale | 3.5 | — |
image_size | integer | Base image size (longest side) | 1024 | — |
num_inference_steps | integer | Number of inference steps | 28 | — |
output_format | string | Output format | "jpg" | png jpg webp |
output_quality | integer | Output quality (for jpg and webp) | 80 | min: 1, max: 100 |
seed | integer | Seed | -1 | — |
speed_mode | string | Speed optimization level | "Extra Juiced 🔥 (more speed)" | Lightly Juiced 🍊 (more consistent) Juiced 🔥 (default) Extra Juiced 🔥 (more speed) Blink of an eye 👁️ |
prompt required string Prompt
aspect_ratio string Aspect ratio of the output image
Default:
"1:1" 1:1 16:9 21:9 3:2 2:3 4:5 5:4 3:4 4:3 9:16 9:21
guidance number Guidance scale
Default:
3.5 image_size integer Base image size (longest side)
Default:
1024 num_inference_steps integer Number of inference steps
Default:
28 output_format string Output format
Default:
"jpg" png jpg webp
output_quality integer Output quality (for jpg and webp)
Default:
80 min: 1, max: 100 seed integer Seed
Default:
-1 speed_mode string Speed optimization level
Default:
"Extra Juiced 🔥 (more speed)" Lightly Juiced 🍊 (more consistent) Juiced 🔥 (default) Extra Juiced 🔥 (more speed) Blink of an eye 👁️
Version:
4f22c6cd75e0 Updated: 2/26/2026 38.9M runs
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