> ## Documentation Index
> Fetch the complete documentation index at: https://www.narev.ai/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# Getting started

> First steps with Minimax middleware for tracking AI costs.

## Installation

```bash npm theme={null}
npm install @ai-billing/minimax @ai-billing/core @ai-sdk/anthropic ai
```

```bash pnpm theme={null}
pnpm add @ai-billing/minimax @ai-billing/core @ai-sdk/anthropic ai
```

```bash yarn theme={null}
yarn add @ai-billing/minimax @ai-billing/core @ai-sdk/anthropic ai
```

## Overview

The `@ai-billing/minimax` package provides middleware for tracking token usage and calculating costs when using Minimax models with the Vercel AI SDK.

It captures Minimax-specific metrics, such as `internalReasoningTokens`, ensuring that reasoning costs are accurately reflected.

## Usage

To use the middleware, wrap your Minimax model (which is accessed via the Anthropic provider) using `wrapLanguageModel` from the `ai` package and pass the `createMinimaxMiddleware`.

**1. Initialize the Minimax provider**

First, set up the provider using the Anthropic SDK with the Minimax base URL and your API key.

```typescript theme={null}
import { createAnthropic } from '@ai-sdk/anthropic';

const minimax = createAnthropic({
  apiKey: process.env.MINIMAX_API_KEY,
  baseURL: 'https://api.minimax.io/anthropic/v1',
});
```

**2. Define model pricing**

Set up a price resolver to define the costs for the models you'll be using. For Minimax, you can specify costs for standard prompt/completion tokens and reasoning tokens (`internalReasoningTokens`).

```typescript theme={null}
import { createObjectPriceResolver } from '@ai-billing/core';

const priceResolver = createObjectPriceResolver({
  'minimax-m1': {
    promptTokens: 0.0000004, // 0.4 per 1M tokens
    completionTokens: 0.0000016, // 1.6 per 1M tokens
    internalReasoningTokens: 0.0000016, // 1.6 per 1M tokens
  },
});
```

**3. Create the billing middleware**

Initialize the Minimax billing middleware. You need to provide a destination (such as `consoleDestination`) where billing events will be sent, along with your `priceResolver`.

```typescript theme={null}
import { createMinimaxMiddleware } from '@ai-billing/minimax';
import { consoleDestination } from '@ai-billing/core';

const billingMiddleware = createMinimaxMiddleware({
  destinations: [consoleDestination()],
  priceResolver: priceResolver,
});
```

**4. Wrap the model**

Use `wrapLanguageModel` from the `ai` package to apply the billing middleware to your Minimax model.

```typescript theme={null}
import { wrapLanguageModel } from 'ai';

const wrappedModel = wrapLanguageModel({
  model: minimax('minimax-m1'),
  middleware: billingMiddleware,
});
```

**5. Use the wrapped model**

Finally, use the wrapped model with AI SDK functions like `generateText` or `streamText`. The billing middleware will automatically track tokens, handle reasoning metrics, and calculate costs.

```typescript theme={null}
import { generateText } from 'ai';

const result = await generateText({
  model: wrappedModel,
  prompt: 'What is the capital of Sweden?',
});
```


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