Are you sure that hitting the cache mean you’re not paying for those tokens?
You pay, at 10% the price (in quota or dollars) for non-cached. See https://platform.claude.com/docs/en/about-claude/pricing
alt Hacker News
You pay, at 10% the price (in quota or dollars) for non-cached. See https://platform.claude.com/docs/en/about-claude/pricing