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

# Usage Event • AI Agent SDK

> UsageEvent: Token usage update.

# UsageEvent

> Defined in the [**events**](https://praison.ai/docs/sdk/reference/praisonaiagents/modules/events.md) module.

AI Agent

Token usage update.

Attributes:
input\_tokens: Number of input tokens consumed.
output\_tokens: Number of output tokens generated.
cache\_creation\_input\_tokens: Tokens used for cache creation.
cache\_read\_input\_tokens: Tokens read from cache.

## Properties

**input\_tokens** `int`

No description available.

**output\_tokens** `int`

No description available.

**cache\_creation\_input\_tokens** `int`

No description available.

**cache\_read\_input\_tokens** `int`

No description available.

## Source

> [card] [View on GitHub](https://github.com/MervinPraison/PraisonAI/blob/main/src/praisonai-agents/praisonaiagents/managed/events.py#L186)
>
> `praisonaiagents/managed/events.py` at line 186


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