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Stable Diffusion XL

Integrate

Model id fast-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-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: ≈$0.005 5 API credits Run it on this page

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Stability AI Text to Image Fast #diffusion#lora#embeddings#high-res

SDXL text-to-image with LoRA and embedding support, negative prompts and up to 8 images per request

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 negative_prompt · safety_checker_version · format · request_id · num_inference_steps · guidance_scale · seed · enable_safety_checker · expand_prompt · loras · embeddings
default

Negative prompt specifying image details to exclude, including colors, objects, scenery, or finer features. Examples include 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 25

Count of inference steps to run.

default 7.5

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

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 []

LoRA weights selected for use, provided as a list.

default []

Embeddings selected for use, provided as a list.

POST /run/fast-sdxl?wait=20 quote → $0.005
# 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-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

A text-to-image diffusion model that takes a required `prompt` plus an optional `negative_prompt` to steer away from unwanted details. Choose from six preset image sizes, 1 to 50 inference steps, a guidance scale from 0 to 20, and 1 to 8 images per call. LoRA weights and embeddings can be supplied as lists, and output can be 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.
negative_promptoptional
Typestring
Default
Negative prompt specifying image details to exclude, including colors, objects, scenery, or finer features. Examples include 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
Default25
1 – 50
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.
guidance_scaleoptional
Typenumber
Default7.5
0 – 20
Prompt-adherence strength for image selection, expressed as CFG (Classifier Free Guidance).
num_imagesoptional num_outputs
Typeinteger
Default1
1 – 8
Image count requested for generation.
lorasoptional
Typeobject[]
Default[]
LoRA weights selected for use, provided as a list.
loras[].forceoptional
Typeboolean
Defaultfalse
Whether embedding use is mandatory: true makes it compulsory.
loras[].pathrequired
Typestring
LoRA weight source, supplied as an HF model identifier resolving to safetensors weights or as a safetensors file located by URL or path.
loras[].scaleoptional
Typenumber
Default1
0 – 1
Multiplier applied to the LoRA weight before it is merged into the base model.
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-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": 5,
    "usd": "0.005",
    "charged": 5,
    "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/en-GB/developers/models/fast-sdxl.md. All models and guides: https://doitong.com/developers/llms.txt