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Checked fact 8328 Oct 2026Agents and apps

OpenAI says prompt caching is enabled by default for supported OpenAI models. Quote: "Prompt caching is enabled by default for supported OpenAI models."

The exact words it rests on

Prompt caching is enabled by default for supported OpenAI models.

What the source said when we opened it, on 8 Oct 2026.

The source

Prompt caching
OpenAI

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In the story

How prompt caching bills a repeated prompt start 8 Oct 2026

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