Getting Started with Vercel AI SDK

The Vercel AI SDK provides a unified API for streaming LLM responses, tool use, and structured output across multiple providers.

Installation

```bash

npm install ai @ai-sdk/openai @ai-sdk/anthropic @ai-sdk/google

```

Basic Streaming Chat

```typescript

import { streamText } from 'ai'

import { openai } from '@ai-sdk/openai'

const result = streamText({

model: openai('gpt-4o'),

prompt: 'Explain quantum computing in simple terms',

})

for await (const chunk of result.textStream) {

process.stdout.write(chunk)

}

```

Multi-Provider Support

Switch between providers with one line:

```typescript

import { anthropic } from '@ai-sdk/anthropic'

import { google } from '@ai-sdk/google'

// Same API, different providers

const result = streamText({

model: anthropic('claude-sonnet-4-6'),

prompt: 'Write a haiku about coding',

})

```

Tool Use

```typescript

import { generateText, tool } from 'ai'

import { z } from 'zod'

const result = await generateText({

model: openai('gpt-4o'),

tools: {

weather: tool({

description: 'Get weather for a location',

parameters: z.object({ city: z.string() }),

execute: async ({ city }) => fetchWeather(city),

}),

},

prompt: 'What is the weather in London?',

})

```