
simonwillison.net
October 4, 2026
3 min read
63/100
Summary
We’re going to need default hard budget caps on pretty much everything 3rd October 2026 Here’s a product feature which the world is going to need a whole lot more of over the coming months and years: default hard budget caps. I’m talking about the feature of pay-by-usage services and APIs that lets you say “after $X/month, cut this thing off and return errors”. These need to be hard limits. Soft c...