> ## 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.

## Example Usage

```typescript theme={null}
import { PromptCacheOptions } from "@openrouter/sdk/models";

let value: PromptCacheOptions = {
  mode: "explicit",
};
```

## Fields

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