Custom extractor model pretrained-foundation-model-v3.1-lite-2026-07-15 powered by Gemini 3.1

## Feature Feature [Custom extractor](https://cloud.google.com/document-ai/docs/ce-with-genai) model`pretrained-foundation-model-v3.1-lite-2026-07-15` powered by Gemini 3.1 Flash Lite LLM is available in [Preview](https://cloud.google.com/products/#product-launch-stages). This processor version supports fine-tuning and is serving multi-region locations in the US and EU. CMEK is not fully supported in all regions, support requires being allowlisted. Contact your Google Cloud account team for more information. For more information about available models, see the [custom extractor](https://cloud.google.com/document-ai/docs/custom-based-extraction) page. ## Feature Feature [Gemini layout parser](https://cloud.google.com/document-ai/docs/layout-parse-chunk) model`pretrained-layout-parser-v3.1-lite-2026-08-11`is in [Preview](https://cloud.google.com/products/#product-launch-stages).