# BaseUsageInput

# Interface: BaseUsageInput

Defined in: [packages/ai/src/utilities/usage.ts:7](https://github.com/TanStack/ai/blob/main/packages/ai/src/utilities/usage.ts#L7)

Input parameters for building base TokenUsage.
Provider functions should extract these from their SDK's response.

## Properties

### completionTokens

```ts
completionTokens: number;
```

Defined in: [packages/ai/src/utilities/usage.ts:11](https://github.com/TanStack/ai/blob/main/packages/ai/src/utilities/usage.ts#L11)

Total output/completion tokens

***

### promptTokens

```ts
promptTokens: number;
```

Defined in: [packages/ai/src/utilities/usage.ts:9](https://github.com/TanStack/ai/blob/main/packages/ai/src/utilities/usage.ts#L9)

Total input/prompt tokens

***

### totalTokens

```ts
totalTokens: number;
```

Defined in: [packages/ai/src/utilities/usage.ts:13](https://github.com/TanStack/ai/blob/main/packages/ai/src/utilities/usage.ts#L13)

Total tokens (prompt + completion)