# DatasetsManager.create()

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

Creates a new dataset. Zod schemas passed as `inputSchema` or `groundTruthSchema` are automatically converted to JSON Schema.

## Usage example

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

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

// Create with metadata
const dataset = await mastra.datasets.create({
  name: "QA evaluation set",
  description: "Question-answer pairs for testing",
  metadata: { team: "ml" },
});

// Create with Zod schemas
const typedDataset = await mastra.datasets.create({
  name: "Typed QA set",
  inputSchema: z.object({
    question: z.string(),
    context: z.string().optional(),
  }),
  groundTruthSchema: z.object({
    answer: z.string(),
  }),
});
```

## Parameters

**name:** (`string`): Display name for the dataset.

**description?:** (`string`): Description of the dataset.

**inputSchema?:** (`unknown`): JSON Schema or Zod schema for item inputs. Zod schemas are auto-converted.

**groundTruthSchema?:** (`unknown`): JSON Schema or Zod schema for item ground truths. Zod schemas are auto-converted.

**metadata?:** (`Record<string, unknown>`): Arbitrary metadata.

## Returns

**result:** (`Promise<Dataset>`): A Dataset instance for the newly created dataset.