Here’s how Affirm CEO @mlevchin decides which AI products are actually worth using: "If you know how to describe the evaluation criteria being used by the maker of the tool you're buying, it's probably worth piloting. If you can't, it's slop and you're being sold a story." "We know codegen works and is amazing because we know how to validate code and you can use another AI to validate code, but you can also just ask, 'Does it work? Does it pass the unit test?'" "For example, Codex was okay,…