> **Experimental**
>
> `@aws-cdk/aws-bedrock-alpha` is an [**experimental**](/stability) (alpha) package: its API may change in any release, without a major version bump.
# VectorStore

The vector store that backs a vector knowledge base.

Use one of the static factory methods to reference an existing store.

- Stability: [Experimental](/cdk/api/stability.html)
- Source: [`bedrock/knowledge-bases/vector-store.ts`](https://github.com/aws/aws-cdk/blob/v2.275.0-alpha.0/packages/@aws-cdk/aws-bedrock-alpha/bedrock/knowledge-bases/vector-store.ts#L47)
- Type last changed: v2.274.0-alpha.0 · 21 Oct 2026

## Example

```ts
declare const collection: opensearchserverless.ICollectionRef;

const knowledgeBase = new bedrock.KnowledgeBase(this, 'KnowledgeBase', {
  type: bedrock.KnowledgeBaseType.vector({
    embeddingsModel: bedrock.BedrockFoundationModel.TITAN_EMBED_TEXT_V2_1024,
    vectorStore: bedrock.VectorStore.openSearchServerless({
      collection,
      vectorIndexName: 'bedrock-knowledge-base-default-index',
      vectorField: 'bedrock-knowledge-base-default-vector',
      textField: 'AMAZON_BEDROCK_TEXT_CHUNK',
      metadataField: 'AMAZON_BEDROCK_METADATA',
    }),
  }),
});
```

## Methods

- `openSearchServerless(props: OpenSearchServerlessVectorStoreProps): VectorStore // chainable` (static) — An existing vector index in an Amazon OpenSearch Serverless collection.