>Average retail prices of Novolin and Humulin (traditional short- and intermediate-acting insulins) have gone down, or held steady, while prices of modern rapid- and long-acting insulins continue to go up. On average, traditional insulins now cost less than half of what modern insulins cost.
https://www.goodrx.com/healthcare-access/research/how-much-d...
There is a lot more going on that makes high end insulin expensive. A lot of conversation around insulin is people talking past each other because they are referring to different things that they think should be free, usually one of these additional features on top of the hormone itself.