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Latent Consistency Models (v1.5/XL) · Image to Image

Integrate

Model id fast-lcm-diffusion/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/fast-lcm-diffusion/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: ≈$0.019 19 API credits Run it on this page

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Open model Image Editing Fast #lcm#diffusion#turbo#real-time

Latent consistency image-to-image that restyles a source image with a strength control

Open model · 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

Describe the image you want generated, using as much detail as possible to get the best results.

•required image_url
Drop a file, or

Starting image for generation, supplied by URL.

image_size default square_hd

Dimensions of the generated image.

num_images default 1

Image count requested for generation.

Advanced negative_prompt · safety_checker_version · format · request_id · num_inference_steps · guidance_scale · strength · seed · enable_safety_checker · expand_prompt · preserve_aspect_ratio · crop_output
default

Negative prompt specifying unwanted image details. It can exclude colors, objects, scenery, or finer features and qualities, such as a moustache, blur, or low resolution.

safety_checker_version default v1

Choose between a custom ViT safety checker (`v2`) and the CompVis checker (`v1`, the default).

format default jpeg

File format for the resulting image.

default

Request identifier for correlating a response with the request that produced it.

default 6

Count of inference steps to run.

default 1.5

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

default 0.95

Degree of resemblance between the generated image and the initial image.

Seed for reproducing images in Stable Diffusion. An image can be reproduced exactly on every run by keeping the model version, prompt, and seed unchanged.

POST /run/fast-lcm-diffusion/image-to-image?wait=20 quote → $0.019
# 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/fast-lcm-diffusion/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 Latent Consistency Models (v1.5/XL) · Image to Image

Starts from `image_url` and a `prompt`, with `strength` from 0.05 to 1 (default 0.95) setting how far the result departs from the source. It runs in few steps (default 6), returns up to 8 images, and offers `preserve_aspect_ratio` and `crop_output` options.

Parameters

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

NameType DefaultAllowed Description
image_urlrequired image
Typeurl · image
Starting image for generation, supplied by URL.
promptrequired
Typestring
Describe the image you want generated, using as much detail as possible to get the best results.
negative_promptoptional
Typestring
Default
Negative prompt specifying unwanted image details. It can exclude colors, objects, scenery, or finer features and qualities, such as a moustache, blur, or low resolution.
image_sizeoptional
Typeobject
Defaultsquare_hd
square_hdsquareportrait_4_3portrait_16_9landscape_4_3landscape_16_9
Dimensions of the generated image.
num_inference_stepsoptional
Typeinteger
Default6
1 – 32
Count of inference steps to run.
guidance_scaleoptional
Typenumber
Default1.5
0 – 20
Prompt-adherence strength for image selection, expressed as CFG (Classifier Free Guidance).
strengthoptional
Typenumber
Default0.95
0.05 – 1
Degree of resemblance between the generated image and the initial image.
seedoptional
Typeinteger | null
Seed for reproducing images in Stable Diffusion. An image can be reproduced exactly on every run by keeping the model version, prompt, and seed unchanged.
num_imagesoptional num_outputs
Typeinteger
Default1
1 – 8
Image count requested for generation.
enable_safety_checkeroptional
Typeboolean
Defaulttrue
Safety checker activation; true enables checking.
safety_checker_versionoptional
Typeenum
Defaultv1
v1v2
Choose between a custom ViT safety checker (`v2`) and the CompVis checker (`v1`, the default).
expand_promptoptional
Typeboolean
Defaultfalse
Prompt expansion with additional prompts, enabled when true.
formatoptional
Typeenum
Defaultjpeg
jpegpng
File format for the resulting image.
request_idoptional
Typestring
Default
Request identifier for correlating a response with the request that produced it.
preserve_aspect_ratiooptional
Typeboolean
Defaultfalse
Set to true to retain the generated image's aspect ratio even when its size exceeds the limit. To obtain the correct proportions through cropping after generation, set crop_output to True. Width or height values not divisible by 32 are still rounded to the closest multiple of 32, and this resizing does not retain the aspect ratio by default.
crop_outputoptional
Typeboolean
Defaultfalse
Crop the generated output to the correct aspect ratio when true.
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": "fast-lcm-diffusion/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": 19,
    "usd": "0.019",
    "charged": 19,
    "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/fast-lcm-diffusion/image-to-image.md. All models and guides: https://doitong.com/developers/llms.txt