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

# CreateMoonshotaiV3Middleware

[**@ai-billing/moonshotai**](../index)

***

[@ai-billing/moonshotai](/docs/sdk/ai-billing/reference/moonshotai/typedoc/index) / createMoonshotaiV3Middleware

# Function: createMoonshotaiV3Middleware()

> **createMoonshotaiV3Middleware**\<`TTags`>(`options`): `LanguageModelV3Middleware`

Defined in: [moonshotai/src/ai-sdk/language-model-middleware/v3/language-model-v3-moonshotai-billing-middleware.ts:96](https://github.com/narevai/ai-billing/blob/main/packages/moonshotai/src/ai-sdk/language-model-middleware/v3/language-model-v3-moonshotai-billing-middleware.ts#L96)

Creates a V3 billing middleware for the Moonshot AI provider (`@ai-sdk/moonshotai`).

Moonshot AI's chat-completions usage payload is OpenAI-compatible. Reasoning models (e.g. `kimi-k3`)
report `completion_tokens_details.reasoning_tokens` as a *subset* of `completion_tokens`, so this
middleware subtracts reasoning tokens out of `completion_tokens` before billing them as
`completionTokens`, and bills the reasoning tokens separately as `reasoningTokens` — avoiding
double-counting reasoning cost.

## Type Parameters

### TTags

`TTags` *extends* `JSONObject`

The shape of the tags object, extending DefaultTags.

## Parameters

### options

[`MoonshotaiV3MiddlewareOptions`](/docs/sdk/ai-billing/reference/moonshotai/typedoc/interfaces/MoonshotaiV3MiddlewareOptions)\<`TTags`>

Billing options; see [MoonshotaiV3MiddlewareOptions](/docs/sdk/ai-billing/reference/moonshotai/typedoc/interfaces/MoonshotaiV3MiddlewareOptions). A `priceResolver` is required.

## Returns

`LanguageModelV3Middleware`

A V3 billing middleware instance for Moonshot AI.

## Example

```ts theme={null}
import { createMoonshotAI } from '@ai-sdk/moonshotai';
import { wrapLanguageModel } from 'ai';
import { createMoonshotaiV3Middleware } from '@ai-billing/moonshotai';
import {
  consoleDestination,
  createObjectPriceResolver,
  type ModelPricing,
} from '@ai-billing/core';

const moonshotai = createMoonshotAI({ apiKey: process.env.MOONSHOT_API_KEY });

const customPricingMap: Record<string, ModelPricing> = {
  'kimi-k3': {
    promptTokens: 3.0 / 1_000_000,
    completionTokens: 15.0 / 1_000_000,
    inputCacheReadTokens: 0.3 / 1_000_000,
    internalReasoningTokens: 15.0 / 1_000_000,
  },
};

const priceResolver = createObjectPriceResolver(customPricingMap);

const billingMiddleware = createMoonshotaiV3Middleware({
  destinations: [consoleDestination()],
  priceResolver,
});

const wrappedModel = wrapLanguageModel({
  model: moonshotai('kimi-k3'),
  middleware: billingMiddleware,
});
```