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

# PromptCacheOptions

Request-level prompt-cache controls. `mode: "explicit"` disables OpenAI-managed breakpoints so only blocks marked with `prompt_cache_breakpoint` are cached. Only supported by OpenAI GPT-5.6 and newer.

## Fields

| Field | Type | Required | Description |
| - | - | - | - |
| `mode` | [components.PromptCacheOptionsMode](../components/promptcacheoptionsmode.mdx) | :heavy\_check\_mark: | N/A |
| `ttl` | *OptionalNullable\[str]* | :heavy\_minus\_sign: | N/A |