RAG Cross Corpus Retrieval RAG Cross Corpus Retrieval is available in public preview

## Feature Feature **RAG Cross Corpus Retrieval** RAG Cross Corpus Retrieval is available in [public preview](https://cloud.google.com/products#product-launch-stages). This feature allows you to retrieve relevant contexts or generate answers from multiple RAG corpora simultaneously using the `AsyncRetrieveContexts` and `AskContexts` APIs. For more information, see [RAG Cross Corpus Retrieval](https://cloud.google.com/vertex-ai/generative-ai/docs/rag-engine/cross-corpus-retrieval).