Kili internal label types (for example, for use with Kili SDK) change throughout an asset lifecycle. A label can be either or:

Default
Review
Prediction
Inference

Default

The DEFAULT type is applied to a label when:

Annotations are submitted on unlabeled assets (status = To Do).
Edits are submitted on labeled assets (status = Labeled).

Review

The REVIEW type is applied to a label during the review process:

To assets with To review status when reviewing through project Queue page.
To assets with Labeled, To review or Reviewed status when reviewing through the "Explore" view.

Prediction

The PREDICTION type can be applied to a label when annotations made by a model (pre-annotations or real predictions) are uploaded through API.
Unlike with INFERENCE, PREDICTION-type annotations are displayed on asset during the labeling process.
Before submitting, labelers can confirm what model produced, edit, and/or add new annotations.

Inference

The INFERENCE type can be applied to a label when annotations made by a model (pre-annotations or real predictions) are uploaded through API.
Unlike with PREDICTIONS, INFERENCE-type annotations are not displayed on asset during the labeling process.
INFERENCE-type labels are used for IoU (intersection over union) calculation if you want to benchmark your model predictions, or labelers' work quality against ground truth.