LTX-2 19B

POST/v1/run

Ltx 2 19b Lora is Lightricks's image-to-video AI model. Bring static images to life with fluid animation, consistent character motion, and professional-grade video output.

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 lightricks/ltx-2-19b/image-to-video/lora.

Default: lightricks/ltx-2-19b/image-to-video/lora

stringpromptrequired

The prompt used for the generation.

stringimagerequired

The URL of the image to generate the video from.

Optional<string>end_image

The URL of the image to use as the end of the video.

Optional<boolean>generate_audio

Whether to generate audio for the video.

Default: true

Optional<number>image_strength

The strength of the image to use for the video generation.

Range: 0 to 1

Default: 1

Optional<string>interpolation_direction

The direction to interpolate the image sequence in. 'Forward' goes from the start image to the end image, 'Backward' goes from the end image to the start image.

Allowed values: forward, backward

Default: forward

Optional<number>end_image_strength

The strength of the end image to use for the video generation.

Range: 0 to 1

Default: 1

Optional<integer>seed

The seed for the random number generator.

Optional<integer>num_inference_steps

Number of denoising or inference steps to run when supported.

Range: 8 to 50

Default: 40

Optional<number>guidance_scale

Request parameter supported by this model.

Range: 1 to 10

Default: 3

Optional<array>loras

Request parameter supported by this model.

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: image-to-video

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": "lightricks/ltx-2-19b/image-to-video/lora",
  "prompt": "A woman stands still amid a busy neon-lit street at night. The camera slowly dollies in toward her face as people blur past, their motion emphasizing her calm presence. City lights flicker and reflections shift across her denim jacket.",
  "image": "https://static.sandbase.ai/examples/lightricks/ltx-2-19b/image-to-video/lora/input_image_0.jpg"
}'

# 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": "lightricks/ltx-2-19b/image-to-video/lora",
  "status": "running",
  "outputs": []
}