Custom classifier models pretrained-classifier-v1.6-2026-03-09 and pretrained-classifier-v1.6-pro-2026-03-09

## Feature Feature [Custom classifier](https://cloud.google.com/document-ai/docs/custom-classifier) models`pretrained-classifier-v1.6-2026-03-09` and `pretrained-classifier-v1.6-pro-2026-03-09`are available in [Preivew](https://cloud.google.com/products/#product-launch-stages). ## Feature Feature [Custom splitter](https://cloud.google.com/document-ai/docs/custom-splitter) models`pretrained-splitter-v1.6-2026-03-09` and `pretrained-splitter-v1.6-pro-2026-03-09`are available in [Preview](https://cloud.google.com/products/#product-launch-stages).