A personal benchmark is a set of tests drawn from your own work, judged by your own standards. If you're an editor, one test might ask an AI to improve a real article opening; its checks ask whether the headline makes the strongest claim and the prose gets more concrete. Each correction you make can become another test, so the benchmark grows with your judgment. Run those tests across models and you can see which one is best for your work today—and when a better or cheaper option comes along.