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Model IDimage_generate.flux_2_flex
ProviderKIE (Black Forest Labs)
ModalityImage — Text-to-Image

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Parameters

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prompt
string
required
Text description of the image to generate.
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image_params.aspect_ratio
string
Output aspect ratio. Options: 1:1, 16:9, 9:16. Default: 1:1.
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image_params.width
number
Output width in pixels.
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image_params.height
number
Output height in pixels.
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image_params.guidance_scale
number
Prompt adherence strength (1–20).
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image_params.steps
number
Number of diffusion steps.
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image_params.seed
number
Random seed for reproducible results.
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callback_url
string
Webhook URL for completion notification.

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Example

curl -X POST https://routerbase.kuaibaike.com/api/v1/run/image_generate.flux_2_flex \
  -H "Authorization: Bearer sk-t0-xxxxxxxxxxxx" \
  -H "Content-Type: application/json" \
  -d '{
    "prompt": "Abstract digital art with flowing neon lines on a dark background",
    "image_params": {
      "aspect_ratio": "1:1"
    }
  }'

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Notes

  • Flex variant offers flexible resolution control with comparable quality to Pro.
  • Requires either aspect_ratio or explicit width/height.