OpenAI rolls out upgraded prompt caching and lower cached input rates for GPT-6

rhiever · reddit · 2026-09-24

OpenAI announced upgraded prompt caching for GPT-6 along with reduced cached input rates, cutting costs for developers who repeatedly send long contexts such as system prompts and conversation history.

Related event: OpenAI Upgrades GPT-6 Prompt Caching with Up to 90% Input Savings and New Dashboard(5 posts)→

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