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

# Efficiency

> Cache repeated prefixes and retry without paying twice.

* [**Prompt caching**](/api/features/prompt-caching): provider cache markers on content parts, preserved on routes that support them.
* [**Safe retries**](/api/features/safe-retries): failed calls are not charged.

## Related

* [Cost Control](/api/features/best-practices/cost-control)
* [Check Usage](/api/get-started/check-usage)


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