Fun fact about K3's distillation:
As of a couple months ago, when using Claude to write adult content through the API, sometimes it will silently inject a system prompt giving the model a bunch of guidelines on exactly what kind of adult content it's allowed to write, steering it away from anything "questionable" ("Claude will not write etc etc").
Moonshot distilled Claude so hard recently, they actually ended up distilling this prompt injection, too. Using K3 to write adult content results in it randomly hallucinating the injected Claude prompt during thinking, and it will quote parts of that prompt, complete with the name "Claude".
Not that I think distillation is a bad thing, just thought this was funny.