Bria Text-to-Image Fast

POST/v1/run

Fast by Bria - 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 bria/text-to-image/fast.

Default: bria/text-to-image/fast

stringpromptrequired

The prompt you would like to use to generate images.

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<integer>seed

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

Range: 0 to 2147483647

Optional<array<object>>guidance

Guidance images to use for the generation. Up to 4 guidance methods can be combined during a single inference.

Default:

Optional<boolean>prompt_enhancement

When set to true, enhances the provided prompt by generating additional, more descriptive variations, resulting in more diverse and creative output images.

Default: false

Optional<string>medium

Which medium should be included in your generated images. This parameter is optional.

Allowed values: photography, art

Optional<integer>num_inference_steps

Number of denoising or inference steps to run when supported.

Range: 4 to 10

Default: 8

Optional<number>guidance_scale

Request parameter supported by this model.

Range: 0 to 20

Default: 5

Response Schema

The submit endpoint returns an accepted generation task. Poll the result endpoint with the returned id for terminal outputs or errors.

Optional<string>error

Error message if the task failed. Empty on success.

stringidrequired

Unique identifier for the generation task.

Optional<string>model

Model ID used for the prediction.

Optional<array>outputs

Array of generated content. Empty when status is not completed.

stringstatusrequired

Status of the task: pending, running, completed, failed, or timeout.

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

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

# 1. Submit a generation request
curl -X POST https://api.sandbase.ai/v1/run \
  -H "Authorization: Bearer $SANDBASE_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
  "model": "bria/text-to-image/fast",
  "prompt": "A lone figure stands on the edge of a serene cliff at sunset, gazing out over a vast, mystical valley. The figure is clad in flowing robes that ripple in the gentle breeze, silhouetted against the golden and lavender hues of the sky. Below, a cascading waterfall pours into a sparkling river winding through a forest of bioluminescent trees. The scene blends the awe of nature with a touch of otherworldly wonder, inviting reflection and imagination.",
  "aspect_ratio": "21:9"
}'

# 2. If the response is still running, poll the returned id
curl https://api.sandbase.ai/v1/run/run_abc123 \
  -H "Authorization: Bearer $SANDBASE_API_KEY"

Response202 Accepted

{
  "id": "run_abc123",
  "model": "bria/text-to-image/fast",
  "status": "running",
  "outputs": []
}