I think they are referring to this changelog item:
> Our image search became even better with the inclusion of two more sources: Yandex Image Search (widely recognized as one of best image search services) and Openverse (vast collection of openly licensed images). Kagi is doing the hard work so that you don't have to.
> Our image search became even better with the inclusion of two more sources: Yandex Image Search (widely recognized as one of best image search services) and Openverse (vast collection of openly licensed images). Kagi is doing the hard work so that you don't have to.
https://kagi.com/changelog#5340