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Stable Diffusion XL Lightning

Integrate

Model id fast-lightning-sdxl
# 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-lightning-sdxl?wait=20" \
  -H "Authorization: Bearer $DOITONG_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "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: ≈$0.004 4 API credits Run it on this page

Get API key
Stability AI Text to Image Fast #diffusion#lightning#real-time

Few-step SDXL Lightning text-to-image limited to 1, 2, 4 or 8 inference steps

Stability AI · 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.

image_size default square_hd

Dimensions of the generated image.

num_images default 1

Image count requested for generation.

Advanced num_inference_steps · safety_checker_version · format · request_id · seed · enable_safety_checker · expand_prompt · embeddings
num_inference_steps default 4

Count of inference steps to run.

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.

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.

default []

Embeddings selected for use, provided as a list.

POST /run/fast-lightning-sdxl?wait=20 quote → $0.004
# 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-lightning-sdxl?wait=20" \
  -H "Authorization: Bearer $DOITONG_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "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 Stable Diffusion XL Lightning

A distilled SDXL variant that generates from a `prompt` using `num_inference_steps` of 1, 2, 4 or 8, with 4 as the default. It supports `embeddings`, six preset `image_size` values and 1 to 8 images per call. There are no `guidance_scale` or LoRA inputs. `format` is jpeg or png.

Parameters

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

NameType DefaultAllowed Description
promptrequired
Typestring
Describe the image you want generated, using as much detail as possible to get the best results.
image_sizeoptional
Typeobject
Defaultsquare_hd
square_hdsquareportrait_4_3portrait_16_9landscape_4_3landscape_16_9
Dimensions of the generated image.
num_inference_stepsoptional
Typeenum
Default4
1248
Count of inference steps to run.
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.
embeddingsoptional
Typeobject[]
Default[]
Embeddings selected for use, provided as a list.
embeddings[].pathrequired
Typestring
Embedding weights specified by URL or file path.
embeddings[].tokensoptional
Typestring[]
Embedding token list, with automatic naming available when omitted: each vector in the embedding file receives a token from the sequence <s0>, <s1>, ... .
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.
required Canonical name, also accepted

Output

GET /requests/req_8k2m4q7x1z9c3v5b6n0p2r4t
{
  "id": "req_8k2m4q7x1z9c3v5b6n0p2r4t",
  "object": "request",
  "model": "fast-lightning-sdxl",
  "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": 4,
    "usd": "0.004",
    "charged": 4,
    "refunded": 0
  },
  "input": {
    "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: Text to Image

For AI agents: this page as Markdown is at https://doitong.com/developers/models/fast-lightning-sdxl.md. All models and guides: https://doitong.com/developers/llms.txt