The docs are a good place to start: https://platform.claude.com/docs/en/build-with-claude/prompt...

Thanks. Just noting that those docs say the cache duration is 5 min and not 1 hour as stated in sibling comment:

> By default, the cache has a 5-minute lifetime. The cache is refreshed for no additional cost each time the cached content is used. > > If you find that 5 minutes is too short, Anthropic also offers a 1-hour cache duration at additional cost.