black-forest-labs/flux-2-pro/text-to-image

Text to Image

Black Forest Labs FLUX.2 Pro is the studio-grade FLUX.2 model, built for photorealistic images with accurate lighting, materials and fine detail. Use it for product shots, editorial photos and campaign visuals, with six size presets from square to 16:9, JPEG or PNG output and repeatable seeds.

Try it Get API keyOpenAPI llms.txt

Prompt *

Image size

More settings (2)

Output Format

Seed

ResultExampleSign in to try

Usage-based · about $0.03 / request · $0.03 reserved per request

Example — generated from this input

Photorealistic editorial photo of a ceramicist's studio at golden hour: an elderly woman with silver hair shapes a wide bowl on a spinning pottery wheel, her hands coated in wet clay, shelves of glazed vessels behind her, dust drifting in warm window light. Shot on an 85mm lens, shallow depth of field, natural skin texture, rich detail.

Pricing

Billed by actual usage; there is no fixed unit price.

Typically about $0.03 per request at default settings.

Each request temporarily reserves $0.03; you are charged for actual usage, usually within a minute: any unused amount is released and any usage above it is charged to your balance, even if that takes it below zero; while your balance is below zero, new requests are paused until a top-up covers it.

Failed generations are not charged.

API

Submit generation requests with this model ID.

POST/v1/model-tasks

black-forest-labs/flux-2-pro/text-to-image

Request body

{
  "model": "black-forest-labs/flux-2-pro/text-to-image",
  "input": {
    "prompt": "Photorealistic editorial photo of a ceramicist's studio at golden hour: an elderly woman with silver hair shapes a wide bowl on a spinning pottery wheel, her hands coated in wet clay, shelves of glazed vessels behind her, dust drifting in warm window light. Shot on an 85mm lens, shallow depth of field, natural skin texture, rich detail.",
    "image_size": "landscape_4_3",
    "output_format": "jpeg"
  }
}

Input schema

Parameter	Type	Requirement	Default
prompt	string	Required	—
image_size	object \| string	Optional	landscape_4_3
output_format	string	Optional	jpeg
seed	integer	Optional	—

Response

The API returns a result or a pollable asynchronous task. See the examples and Schema below for the response mode and result fields.

Asynchronous task

Submit response

HTTP 202

/v1/model-tasksapplication/json

{
  "id": "task_example",
  "model": "black-forest-labs/flux-2-pro/text-to-image",
  "status": "queued"
}

Status response

HTTP 200

/v1/model-tasks/{id}application/json

{
  "id": "task_example",
  "model": "black-forest-labs/flux-2-pro/text-to-image",
  "status": "completed",
  "output": {
    "images": [
      {
        "url": "https://api.musespan.com/v1/model-tasks/task_example/artifacts/0"
      }
    ]
  }
}

File download

HTTP 200

/v1/model-tasks/{id}/artifacts/{index}Generated image (e.g. image/png)

When the task completes, file URLs in output point to this endpoint, numbered from 0. Send the same API key (Authorization header) when downloading.

Error response

HTTP 400

/v1/model-tasksapplication/json

{
  "error": {
    "code": "invalid_input",
    "message": "The input does not match this model's input schema. Check the model's API documentation.",
    "type": "invalid_request_error"
  }
}

Code examples

Async submission returns a task ID. Poll until status is completed, then retrieve the generated content from the result. Get your API key in the console.

# Use a new directory for each new generation. Rerunning here continues this task.
set -eu
test -s model-task-id.txt || python3 -c "import uuid; print(uuid.uuid4())" > model-task-id.txt
REQUEST_ID=$(cat model-task-id.txt)
# Idempotent: resending the same bytes with the same ID never charges twice.
curl --fail-with-body --retry 3 --retry-connrefused --request POST 'https://api.musespan.com/v1/model-tasks' \
  --header "Authorization: Bearer $MUSESPAN_API_KEY" \
  --header "X-Request-Id: $REQUEST_ID" \
  --header "Content-Type: application/json" \
  --data '{"model":"black-forest-labs/flux-2-pro/text-to-image","input":{"prompt":"Photorealistic editorial photo of a ceramicist'\''s studio at golden hour: an elderly woman with silver hair shapes a wide bowl on a spinning pottery wheel, her hands coated in wet clay, shelves of glazed vessels behind her, dust drifting in warm window light. Shot on an 85mm lens, shallow depth of field, natural skin texture, rich detail.","image_size":"landscape_4_3","output_format":"jpeg"}}'
# Poll every 5 seconds for up to 25 minutes until status is completed or failed.
# Still queued (with queue_position) 5 minutes after submission: failed with queue_timeout, not charged.
# No result 15 minutes after acceptance (or no confirmation 15 minutes after submission): failed with generation_timeout, not charged.
# Any failure is final: generate again in a new directory (a new X-Request-Id).
# A 404 means the POST did not arrive: rerun this script to resend it with the same ID.
curl --fail-with-body 'https://api.musespan.com/v1/model-tasks/'"$REQUEST_ID"'' --header "Authorization: Bearer $MUSESPAN_API_KEY"