# GPT-6 prompt caching can be tuned with breakpoints and prewarming

OpenAI Developers says applications can select reusable prompt prefixes with explicit cache breakpoints, change reasoning effort and tool availability while preserving cached context, and prewarm shared context so responses start sooner.

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Source: OpenAI Developers · Published 9/22/2026, 14:25:22

OpenAI Developers says applications can tune [GPT-6 prompt caching](https://openai.com/index/better-prompt-caching-for-gpt-6/) in three ways. Explicit cache breakpoints choose which prompt prefixes to reuse. Reasoning effort and tool availability can be adjusted while cached context is preserved, and shared context can be prewarmed so responses start sooner.

Tags: OpenAI, GPT-6, Prompt caching

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