# Vercel AI SDK setup

The Vercel AI SDK works with Claudech through its OpenAI-compatible provider, or through the Anthropic provider with a custom base URL.

## Before you start

- **A Claudech API key** from [API keys](https://claudech.com/api-keys), stored as `CLAUDECH_API_KEY`. API access unlocks after your first purchase.

## OpenAI-compatible provider

```typescript
// npm install ai @ai-sdk/openai-compatible
import { createOpenAICompatible } from '@ai-sdk/openai-compatible';
import { generateText } from 'ai';

const claudech = createOpenAICompatible({
  name: 'claudech',
  apiKey: process.env.CLAUDECH_API_KEY!,
  baseURL: 'https://api.claudech.com/v1',
});

const { text } = await generateText({
  model: claudech('claude-opus-5-5'),
  prompt: 'Summarise the plot of Hamlet in one paragraph.',
});
```

## Streaming in a Next.js route handler

```typescript
// app/api/chat/route.ts
import { createOpenAICompatible } from '@ai-sdk/openai-compatible';
import { streamText } from 'ai';

const claudech = createOpenAICompatible({
  name: 'claudech',
  apiKey: process.env.CLAUDECH_API_KEY!,
  baseURL: 'https://api.claudech.com/v1',
});

export async function POST(req: Request) {
  const { prompt } = await req.json();
  const result = streamText({ model: claudech('claude-sonnet-5'), prompt });
  return result.toTextStreamResponse();
}
```

## Anthropic provider

If your code already uses `@ai-sdk/anthropic`, point it at Claudech instead:

```typescript
// npm install ai @ai-sdk/anthropic
import { createAnthropic } from '@ai-sdk/anthropic';

const claudech = createAnthropic({
  apiKey: process.env.CLAUDECH_API_KEY!,
  baseURL: 'https://api.claudech.com/v1',
});
```

Here the base URL includes `/v1`, because the Anthropic provider appends `/messages` to it.

## Things to know

- Tool calling, streaming and JSON output work with every Claudech model.
- Claudech does not offer embeddings or image generation, so `embed` and image helpers need another provider.

See [all integrations](https://claudech.com/docs/integrations) for other frameworks. Claudech is an independent service and is not affiliated with Vercel.

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Source: https://claudech.com/docs/integrations/vercel-ai-sdk