Or, just spin up your own review workflow, I've been doing this for the past couple of months after experimenting with Greptile and it works pretty well, example setup below:

https://gist.github.com/rlueder/a3e7b1eb40d90c29f587a4a8cb7c...

An average of $0.04/review (200+ PRs with two rounds each approx.) total of $19.50 using Opus 4.6 over February.

It fills in a gap of working on a solo project and not having another set of eyes to look at changes.