> ## 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.

# CreateGatewayV3Middleware

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

***

[@ai-billing/gateway](/docs/sdk/ai-billing/reference/gateway/typedoc/index) / createGatewayV3Middleware

# Function: createGatewayV3Middleware()

> **createGatewayV3Middleware**\<`TTags`>(`options`): `LanguageModelV3Middleware`

Defined in: [gateway/src/ai-sdk/language-model-middleware/v3/language-model-v3-ai-gateway-billing-middleware.ts:103](https://github.com/narevai/ai-billing/blob/main/packages/gateway/src/ai-sdk/language-model-middleware/v3/language-model-v3-ai-gateway-billing-middleware.ts#L103)

Creates a V3 billing middleware configured for the Vercel AI Gateway provider.
Extracts cost and usage data from gateway-specific provider metadata.

## Type Parameters

### TTags

`TTags` *extends* `JSONObject`

The shape of the tags object, extending DefaultTags. Defaults to standard tags.

## Parameters

### options

[`GatewayV3MiddlewareOptions`](/docs/sdk/ai-billing/reference/gateway/typedoc/interfaces/GatewayV3MiddlewareOptions)\<`TTags`>

Shared billing options; see [GatewayV3MiddlewareOptions](/docs/sdk/ai-billing/reference/gateway/typedoc/interfaces/GatewayV3MiddlewareOptions) for what you can pass and
what is implied by the gateway provider.

## Returns

`LanguageModelV3Middleware`

A V3 billing middleware instance for the AI Gateway.

## Example

Same wiring as `examples/dev-sandbox/app/api/gateway` (`createGatewayMiddleware` is this function’s export
alias from `@ai-billing/gateway`).

```ts theme={null}
import { createGateway, wrapLanguageModel } from 'ai';
import { createGatewayMiddleware } from '@ai-billing/gateway';
import { consoleDestination } from '@ai-billing/core';

const gateway = createGateway({ apiKey: process.env.AI_GATEWAY_API_KEY });

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

const wrappedModel = wrapLanguageModel({
  model: gateway('gpt-5'),
  middleware: billingMiddleware,
});
```