# dataset.addItems()

**Added in:** `@mastra/core@1.4.0`

Adds multiple items to the dataset in a single bulk operation.

## Usage example

```typescript
import { Mastra } from "@mastra/core";

const mastra = new Mastra({ /* storage config */ });

const dataset = await mastra.datasets.get({ id: "dataset-id" });

const items = await dataset.addItems({
  items: [
    { input: { question: "What is AI?" }, groundTruth: { answer: "Artificial Intelligence" } },
    { input: { question: "What is ML?" }, groundTruth: { answer: "Machine Learning" } },
    { input: { question: "What is DL?" }, metadata: { category: "deep-learning" } },
  ],
});

console.log(`Added ${items.length} items`);
```

## Parameters

**items:** (`Array<object>`): DatasetIteminput:unknownInput data for the item.groundTruth?:unknownExpected output or ground truth.metadata?:Record\<string, unknown>Arbitrary metadata.

## Returns

**result:** (`Promise<DatasetItem[]>`): Array of created dataset items. See dataset.addItem() for the item shape.