Well, not so much anymore. It's capped at $35/mo if you're on Medicare or ACA and most other sources.

https://investor.lilly.com/news-releases/news-release-detail...

I'd also mention that most of the insulin these days is not extracted from animals as it once was. One can make arguments for/against this, but for safety reasons almost all of it is now made with biopharmaceutical (bacterial recombinant) processes.