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FLUX.1 Krea · Image to Image

Integrate

Model id flux/krea/image-to-image
# Run the model; wait up to 20 s for the finished result in the same call
curl -X POST "https://api.doitong.com/v1/run/flux/krea/image-to-image?wait=20" \
  -H "Authorization: Bearer $DOITONG_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "image": "https://content.doitong.com/images/showcase/v3/gen_fox_cartoon.jpg",
    "prompt": "A red fox trots through fresh snow at sunrise, soft golden light, shallow depth of field"
  }'

# Still "queued" or "running"? Poll with the id from the response:
curl "https://api.doitong.com/v1/requests/REQUEST_ID?wait=20" \
  -H "Authorization: Bearer $DOITONG_API_KEY"

This request: ≈$0.075 75 API credits Run it on this page

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Black Forest Labs Image Editing

FLUX.1 Krea [dev] image-to-image that rewrites a source image from a prompt and strength value

Black Forest Labs · Image

Your first result goes here

Build a request below and run it with your API key. Outputs are copied to our storage, kept forever or 7 days for free.

Build a request

Controls are generated from the model schema. The code and the price update as you change them.

•required

Prompt that guides image generation.

•required image_url
Drop a file, or

URL pointing to the source image used for image generation.

num_images default 1

Image count requested for generation.

Advanced output_format · acceleration · strength · num_inference_steps · guidance_scale · seed · enable_safety_checker
output_format default jpeg

File format for the resulting image.

acceleration default none

Generation acceleration, with higher settings reducing the time needed to generate results.

default 0.95

Initial-image strength setting, for which this model favors higher values.

default 40

Count of inference steps to run.

default 4.5

Prompt-adherence strength for image selection, expressed as CFG (Classifier Free Guidance).

Seed for reproducible images: an identical prompt and seed produce an identical image when the model version is unchanged.

POST /run/flux/krea/image-to-image?wait=20 quote → $0.075
# Run the model; wait up to 20 s for the finished result in the same call
curl -X POST "https://api.doitong.com/v1/run/flux/krea/image-to-image?wait=20" \
  -H "Authorization: Bearer $DOITONG_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "image": "https://content.doitong.com/images/showcase/v3/gen_fox_cartoon.jpg",
    "prompt": "A red fox trots through fresh snow at sunrise, soft golden light, shallow depth of field"
  }'

# Still "queued" or "running"? Poll with the id from the response:
curl "https://api.doitong.com/v1/requests/REQUEST_ID?wait=20" \
  -H "Authorization: Bearer $DOITONG_API_KEY"

Run this request

Your key stays in this browser: it is sent only to the Doitong API and saved (localStorage) only if you tick Remember. Get an API key

About FLUX.1 Krea · Image to Image

Takes an `image_url` and a `prompt` and produces new versions of the image. `strength` runs 0.01 to 1 with a default of 0.95, and higher values are recommended. `num_inference_steps` is 10 to 50 (default 40), `guidance_scale` 1 to 20, and up to 4 images are returned as jpeg or png.

Parameters

Send either the canonical name or the native name, not both. Canonical names

NameType DefaultAllowed Description
image_urlrequired image
Typeurl · image
URL pointing to the source image used for image generation.
strengthoptional
Typenumber
Default0.95
0.01 – 1
Initial-image strength setting, for which this model favors higher values.
num_inference_stepsoptional
Typeinteger
Default40
10 – 50
Count of inference steps to run.
promptrequired
Typestring
Prompt that guides image generation.
seedoptional
Typeinteger | null
Seed for reproducible images: an identical prompt and seed produce an identical image when the model version is unchanged.
guidance_scaleoptional
Typenumber
Default4.5
1 – 20
Prompt-adherence strength for image selection, expressed as CFG (Classifier Free Guidance).
num_imagesoptional num_outputs
Typeinteger
Default1
1 – 4
Image count requested for generation.
enable_safety_checkeroptional
Typeboolean
Defaulttrue
Safety checking, which returns black images in place of any images flagged unsafe. A value of true enables checking; false disables it only for authorized accounts, while requests without authorization are checked regardless.
output_formatoptional
Typeenum
Defaultjpeg
jpegpng
File format for the resulting image.
accelerationoptional
Typeenum
Defaultnone
noneregularhigh
Generation acceleration, with higher settings reducing the time needed to generate results.
required Canonical name, also accepted

File parameters take a public https:// URL, a data: URI up to 10 MB, or the file_url of an upload. Files

Output

GET /requests/req_8k2m4q7x1z9c3v5b6n0p2r4t
{
  "id": "req_8k2m4q7x1z9c3v5b6n0p2r4t",
  "object": "request",
  "model": "flux/krea/image-to-image",
  "status": "succeeded",
  "created_at": "2026-10-20T12:00:00Z",
  "started_at": "2026-10-20T12:00:02Z",
  "completed_at": "2026-10-20T12:00:09Z",
  "queue_position": null,
  "cost": {
    "credits": 75,
    "usd": "0.075",
    "charged": 75,
    "refunded": 0
  },
  "input": {
    "image_url": "https://content.doitong.com/images/showcase/v3/gen_fox_cartoon.jpg",
    "prompt": "A red fox trots through fresh snow at sunrise, soft golden light, shallow depth of field"
  },
  "output": {
    "images": [
      {
        "url": "https://content.doitong.com/dev-api/2026/10/20/req_8k2m4q7x1z9c3v5b6n0p2r4t/0-output.jpeg",
        "width": 1024,
        "height": 768,
        "content_type": "image/jpeg"
      }
    ],
    "timings": {},
    "seed": 42,
    "has_nsfw_concepts": [
      false
    ],
    "prompt": "string"
  },
  "outputs": [
    {
      "type": "image",
      "url": "https://content.doitong.com/dev-api/2026/10/20/req_8k2m4q7x1z9c3v5b6n0p2r4t/0-output.jpeg",
      "content_type": "image/jpeg",
      "file_size": 1843200,
      "width": 1024,
      "height": 768,
      "stored": true
    }
  ],
  "error": null,
  "metrics": {
    "inference_seconds": 6.8
  },
  "urls": {
    "self": "https://api.doitong.com/v1/requests/req_8k2m4q7x1z9c3v5b6n0p2r4t",
    "cancel": "https://api.doitong.com/v1/requests/req_8k2m4q7x1z9c3v5b6n0p2r4t/cancel"
  }
}
Your files, your choiceEvery outputs[].url is a copy on our storage: kept forever (paid per GB-month) or 7 days for free, by your account setting or ?storage=.
Same shape on every modeltype, url, content_type, width, height and duration, for images, video and audio alike. output is the model’s own result object.
Fields of output
images
array of object {url, width, height, content_type}File information for the generated images.
timings
object
seed
integerImage-generation seed, including the randomly chosen value if the input omitted a seed; otherwise, it repeats the supplied value.
has_nsfw_concepts
array of booleanIndicates whether NSFW concepts appear in the generated images.
prompt
stringPrompt used during image generation.

More models: Image Editing

For AI agents: this page as Markdown is at https://doitong.com/developers/models/flux/krea/image-to-image.md. All models and guides: https://doitong.com/developers/llms.txt