Imagen 4

POST/v1/run

Imagen 4 Preview Fast is Google's advanced text-to-image AI model. Create photorealistic images, illustrations, and concept art from natural language descriptions with exceptional detail and prompt adherence.

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 google/imagen-4/preview/fast.

Default: google/imagen-4/preview/fast

stringpromptrequired

The text prompt to generate an image from.

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<string>output_format

The format of the generated image.

Allowed values: jpeg, png

Default: png

Optional<integer>seed

The seed for the random number generator.

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": "google/imagen-4/preview/fast",
  "prompt": "Atmospheric narrative illustration depicting a young woman with dark hair styled with a single star clip, eating dumplings at a small round table in a bustling, late-night eatery reminiscent of a vintage Hong Kong diner. The style blends clean linework with textured color fields, evoking a sense of place and story. The mood is intimate contentment amidst vibrant surroundings. Soft, warm overhead lighting from unseen hanging lamps casts gentle highlights on her face and the porcelain plate of dumplings, creating soft-edged shadows on the tiled tabletop and floor. The background features detailed elements like wall menus with stylized illustrations, a retro wall clock, steam rising from a soup bowl, and glimpses of other patrons blurred slightly for depth. The woman, viewed from a slightly high angle, crouches slightly on her chair, intensely focused on her food, rendered with expressive linework defining her pose and features. The color palette mixes muted teal wall tiles and green chairs with pops of warm yellow in her top, pink trousers, red chili oil dish, and ambient light, creating a cozy yet lively feel. Subtle paper texture or digital grain is visible throughout. Focus is sharp on the character and her immediate table setting",
  "aspect_ratio": "21:9",
  "output_format": "png"
}'

# 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": "google/imagen-4/preview/fast",
  "status": "running",
  "outputs": []
}