<p>Starts the running of the version of a model. Starting a model takes a while to complete. To check the current state of the model, use <a>DescribeProjectVersions</a>.</p> <p>Once the model is running, you can detect custom labels in new images by calling <a>DetectCustomLabels</a>.</p> <note> <p>You are charged for the amount of time that the model is running. To stop a running model, call <a>StopProjectVersion</a>.</p> </note> <p>For more information, see <i>Running a trained Amazon Rekognition Custom Labels model</i> in the Amazon Rekognition Custom Labels Guide.</p> <p>This operation requires permissions to perform the <code>rekognition:StartProjectVersion</code> action.</p>

{
  "success": true,
  "data": {
    "id": "abc123",
    "created_at": "2025-01-01T00:00:00Z"
  }
}

{
  "success": false,
  "error": {
    "code": "VALIDATION_ERROR",
    "message": "Invalid request parameters"
  }
}