Checked fact 8298 Oct 2026Agents and apps

OpenAI says the minimum cacheable prompt length is 1,024 tokens for GPT-5.6 and later. Quote: "The minimum cacheable prompt length is 1,024 tokens for GPT‑5.6 and later"

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The minimum cacheable prompt length is 1,024 tokens for GPT-5.6 and later and varies by request settings for earlier models.

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

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Prompt caching
OpenAI

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Checked by the notis newsroom on 8 Oct 2026, against the source above.

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How prompt caching bills a repeated prompt start 8 Oct 2026

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“OpenAI says the minimum cacheable prompt length is 1,024 tokens for GPT-5.6 and later. Quote: "The minimum cacheable prompt length is 1,024 tokens for GPT‑5.6 and later".” ai notis, checked 8 Oct 2026. Source: Prompt caching (OpenAI). https://ainotis.com/c/829

As a reference (APA style)

ai notis. (2026, October 8). OpenAI says the minimum cacheable prompt length is 1,024 tokens for GPT-5.6 and later. Quote: "The minimum cacheable prompt length is 1,024 tokens for GPT‑5.6 and later" [Checked claim 829]. ai notis. https://ainotis.com/c/829

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