text-to-image

Flux 2 Flex - Create image from text

Create highly customizable images using FLUX.2 [flex] from Black Forest Labs, a flexible text-to-image model with an extended resolution range.

Key Features:

  • Professional quality with fine-grained control
  • Text-to-image generation
  • Image-to-image editing (up to 4 input images)
  • Wide resolution range (256-1920px) for large-format output
  • Adjustable guidance and inference steps
  • Selectable output format (JPEG or PNG)
  • Reproducible results with seed

Use Cases:

  • Large-format marketing materials and posters
  • Product photography variations
  • Concept art and illustrations
  • Image editing and enhancement
post/v1/ai/text-to-image/flux-2-flex

Request

  • Base URL: https://api.magnific.com
  • URL: https://api.magnific.com/v1/ai/text-to-image/flux-2-flex
  • Auth: API key in header x-magnific-api-key

Request body

promptstring required

Text description of the image you want to generate.

FLUX.2 [flex] offers flexible, professional-grade image generation with fine-grained control over guidance, steps, and a wide resolution range for large-format output.

Tips for better results:

  • Be specific about subjects, scenes, and visual details
  • Describe lighting, atmosphere, and mood
  • Mention art style or photographic techniques if desired

Examples:

  • Simple: "a cat sitting on a windowsill"
  • Detailed: "a fluffy orange tabby cat sitting on a rustic wooden windowsill, golden hour lighting, soft focus background"
  • Creative: "futuristic cityscape at night with neon lights reflecting on wet streets, cyberpunk aesthetic, dramatic lighting"
widthinteger

Width of the image in pixels.

Valid range: 256 to 1920 pixels Default: 1024 pixels

Common sizes:

  • Square: 1024×1024
  • Landscape: 1920×1080 (16:9)
  • Portrait: 1080×1920 (9:16)
heightinteger

Height of the image in pixels.

Valid range: 256 to 1920 pixels Default: 768 pixels

Tip: Total megapixels affect generation cost. Higher resolution = higher cost.

seedinteger nullable

Random seed for reproducible results.

Use case: Generate variations of the same image by using the same seed with slightly modified prompts.

Valid range: 0 to 4,294,967,295 Default: Random seed (if not provided)

guidancenumber nullable

Guidance scale for the generation. Higher values make the model follow the prompt more closely. Valid range: 1.5 to 10.0.

stepsinteger nullable

Number of inference steps. More steps generally produce higher quality but take longer. Valid range: 1 to 50.

safety_toleranceinteger nullable

Tolerance level for input and output moderation. Between 0 and 5, 0 being most strict, 5 being least strict.

prompt_upsamplingboolean

Automatically enhance and expand your prompt for better generation results.

When to enable:

  • Using simple, short prompts
  • Want AI to add creative details
  • Experimenting with variations

When to disable:

  • Using detailed, specific prompts
  • Need exact control over output
  • Following brand guidelines
output_format'jpeg' | 'png' nullable

Format of the output image

input_imagestring nullable

Base64-encoded input image for image-to-image generation or image editing.

Supported formats: JPEG, PNG, WebP Use cases:

  • Modify existing images
  • Style transfer
  • Composition refinement

Note: Can provide up to 4 input images using input_image, input_image_2, input_image_3, and input_image_4.

input_image_2string nullable

Second base64-encoded input image for multi-image generation.

input_image_3string nullable

Third base64-encoded input image for multi-image generation.

input_image_4string nullable

Fourth base64-encoded input image for multi-image generation.

webhook_urlstring uri

Optional callback URL that will receive asynchronous notifications whenever the task changes status. The payload sent to this URL is the same as the corresponding GET endpoint response, but without the data field.

Example request

{
  "prompt": "a beautiful sunset over the ocean with dramatic clouds",
  "width": 1024,
  "height": 768,
  "seed": 42,
  "webhook_url": "https://www.example.com/webhook"
}

Response

OK - Task created successfully

Example response

{
  "data": {
    "task_id": "046b6c7f-0b8a-43b9-b35d-6489e6daee91",
    "status": "CREATED"
  }
}

Changes

No recorded changes to this operation across all 1 revision of this API.