OpenAIGuides & TipsOfficial Docs
OpenAI documents Prompt Caching to cut latency and cost
For repeated prompts, you can speed up responses and lower costs.
Key Points
- 1Cache works on exact prompt-prefix matches
- 2Put static text first, variable inputs last
- 3Benefits grow with longer, repeated prompts
OpenAI’s Prompt Caching guide explains how reusing identical prompt prefixes can reduce latency and input costs for long prompts. It recommends placing static instructions/examples first and variable user content last to maximize cache hits.