Learn how AI pricing works.
Short explainers on the ideas behind AI costs. No fluff, each one ends at the calculator.
Articles
01
What is a token?
The chunk a model actually reads — and the unit you're billed in.
~4 min · Sep 19, 2026
02
What is prompt caching?
Cache reads up to 90% cheaper — how warm prompts stay cheap and when caching pays off.
~4 min · Sep 19, 2026