📄 ai-sdk/cookbook/node/generate-object
File: generate-object.md | Updated: 11/15/2025
Source: https://ai-sdk.dev/cookbook/node/generate-object
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Earlier functions like generateText and streamText gave us the ability to generate unstructured text. However, if you want to generate structured data like JSON, you can provide a schema that describes the structure of your desired object to the generateObject function.
The function requires you to provide a schema using zod , a library for defining schemas for JavaScript objects. By using zod, you can also use it to validate the generated object and ensure that it conforms to the specified structure.
import { generateObject } from 'ai';import { openai } from '@ai-sdk/openai';import { z } from 'zod';
const result = await generateObject({ model: openai('gpt-4.1'), schema: z.object({ recipe: z.object({ name: z.string(), ingredients: z.array( z.object({ name: z.string(), amount: z.string(), }), ), steps: z.array(z.string()), }), }), prompt: 'Generate a lasagna recipe.',});
console.log(JSON.stringify(result.object.recipe, null, 2));
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