openai/OpenAiPromptCacheOptions.java

Configures OpenAI prompt caching options for GPT‑5.6+ models.

// Source: https://github.com/langchain4j/langchain4j | License: Apache-2.0 | Copyright You must retain, in the Source form of any Derivative Works
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package dev.langchain4j.model.openai;

import static dev.langchain4j.internal.Utils.quoted;

import java.util.Objects;

/**
 * Represents the {@code prompt_cache_options} request object supported by {@code gpt-5.6} and later.
 * <p>
 * On these models a cached prefix is matched exactly at a
 * {@link OpenAiPromptCacheBreakpoint breakpoint}, without falling back to a shorter unmarked prefix.
 * The {@code mode} controls where breakpoints come from:
 * <ul>
 *     <li>{@link #MODE_IMPLICIT} - OpenAI places a breakpoint at the end of the newest eligible message.</li>
 *     <li>{@lin

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