[throwa356262]

This data sort of disqualifies itself: unless Moonshot has a time machine, K3 should be more similar to Opus 4.5-4.8 than Fable 5.

Keep in mind, Anthropic started limiting access and introduced anti-distillation measures around 4.5-4.6 (?). So the majority of distillation should have happened on earlier models.

Maybe a better explanation is that they have access to the same training datasets? Which if private can again raise questions about theft, but on a very different level.