Repeated context is the lever
System instructions, tool definitions, and stable document context are common candidates. New user input remains billed at the standard input rate in this scenario.
Repeated context cost check
Prompt caching cost calculator
Estimate how much repeated prompt context could cost when a provider charges a lower cached-input rate. Compare standard and cached scenarios using tracked model prices.
Estimated monthly savings
$0.00
Calculating...
Without cached input$0.00
With tracked cached input$0.00
Effective cache rate0%
Hit rate changes the result
The calculator applies your cache-hit percentage only to repeated context. Measure real hit rate and expiration behavior after launch.
Check the provider rules
Minimum tokens, cache-write charges, storage duration, and API formatting can change the real result. Review the selected model's official source.
Read the methodologyFAQ
Questions teams ask before choosing
What does this prompt caching calculator include?
It compares standard input pricing with cached-input pricing for repeated context, plus output cost, using the selected model's tracked default profile.
Does the result include cache-write or storage charges?
No. Cache-write, cache-storage, minimum token, expiration, and provider-specific cache rules are not added to this simple scenario unless you model them separately from the official provider documentation.
When can prompt caching reduce cost?
Caching can help when the same system instructions, tool definitions, or document context recur often enough and the provider's cached-input rate is lower than its standard input rate. Validate cache eligibility and hit rate with your own traffic.