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Stable Diffusion v1.5

POST/v1/run

Stable Diffusion V15 by Stability AI - generate stunning images from text prompts with state-of-the-art AI. Supports multiple aspect ratios, styles, and high-resolution output for creative and commercial use.

Request body

Submit an async generation request. The model field selects the model; other fields are model-specific input parameters.

stringmodelrequired

Model identifier. Set to stability-ai/stable-diffusion-v15.

Default: stability-ai/stable-diffusion-v15

stringpromptrequired

The prompt to use for generating the image. Be as descriptive as possible for best results.

Optional<string>aspect_ratio

The aspect ratio of the generated image.

Allowed values: 21:9, 16:9, 3:2, 4:3, 5:4, 1:1, 4:5, 3:4, 2:3, 9:16

Optional<number>guidance_scale

The CFG (Classifier Free Guidance) scale is a measure of how close you want the model to stick to your prompt when looking for a related image to show you.

Range: 0 to 20

Default: 7.5

Optional<integer>num_inference_steps

The number of inference steps to perform.

Range: 1 to 50

Default: 25

Optional<integer>seed

The same seed and the same prompt given to the same version of Stable Diffusion will output the same image every time.

Default: null

Optional<array<object>>loras

The list of LoRA weights to use.

Default:

Optional<array<object>>embeddings

The list of embeddings to use.

Default:

Optional<string>safety_checker_version

The version of the safety checker to use. v1 is the default CompVis safety checker. v2 uses a custom ViT model.

Allowed values: v1, v2

Default: v1

Optional<boolean>expand_prompt

If set to true, the prompt will be expanded with additional prompts.

Default: false

Optional<string>request_id

An id bound to a request, can be used with response to identify the request itself.

Default:

Optional<string>format

The format of the generated image.

Allowed values: jpeg, png

Default: jpeg

Response Schema

The submit endpoint returns a run response. If its status is pending or running, poll GET /v1/run/{id} with the returned opaque ID until it reaches a terminal state.

stringidrequired

Opaque SandBase run identifier. Use it exactly as returned; no prefix is guaranteed.

stringstatusrequired

Current public run status.

Allowed values: pending, running, completed, failed, timeout

Optional<string>model

Public SandBase model name used for this run.

Optional<array<object>>outputs

Present only for completed runs. Each object is capability-specific; inspect the selected model schema for its fields.

Optional<object>error

Present only for failed or timeout runs. Contains a public error type and sanitized message.

Optional<string>error.type

Stable public error category.

Optional<string>error.message

Sanitized error message safe to show to clients.

Optional<object>usage

Usage details when available.

Model capabilities

array<string>capability_tagsrequired

Capabilities declared by the model registry.

Default: text-to-image

stringexecution_moderequired

Execution mode declared by the model registry.

Default: async