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Image generation

FLUX1.1 [pro] Ultra

FLUX1.1 [pro] Ultra delivers ultra-fast, ultra high-resolution image creation - with more pixels in every picture. Generate varying aspect ratios from text, at 4MP resolution fast. This provider gives the option to change the moderation level for inputs and outputs. The control is under safety tolerance and is by default 2 on a range from 0 (more strict) through 6 (more permissive).

Get an API keyAPI examplesAll models

One image per request

$0.063Per image

Pricing

Price

Per image
$0.063

Includes the 5% MiniRouter fee. The final charge uses the provider’s actual cost and stays within your reserved hold. MiniRouter absorbs any overrun.

Estimate your credit hold

Credit is reserved before the request. The final charge may be lower.

Up to 32,000 characters.

Estimated hold

$0.126

2× the total estimated cost, including the 5% fee. Your charge stays within this hold; unused credit is released.

Estimate only; nothing is sent. Includes text and one output image.

Use the Images API

Set MINIROUTER_API_KEY to your inference key. Copy the example.

curl --fail-with-body --retry 0 --max-time 120 \
  'https://api.minirouter.sh/v1/images/generations' \
  -H "Authorization: Bearer $MINIROUTER_API_KEY" \
  -D response.headers --output response.json \
  -H 'Content-Type: application/json' \
  --data '{
  "model": "bfl/flux-pro-1.1-ultra",
  "prompt": "A blue circle on a white background.",
  "n": 1
}'

Keep the request ID. The image response can arrive before its final charge. Check Request logs for the settled cost. A failed or disconnected request may still incur a cost; these examples disable automatic retries.

Operations

Supported operations

Generate from a prompt
POST /v1/images/generations
Send JSON with a prompt. The response contains one base64 image.

Every model, one key.

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