Mythos/Fable-class models have been around for at least 4 months internally in the US, and Kimi still isn't quite there, so I'd say the 6-months is still about right.
Initial testing for Mythos was in April 2026, right? Sure, they had the model internally before that when they were working on it, but the same is true for Moonshot and K3.
This is fair, with the caveat that we don't know for how long this model has been around internally in China either. So we can only go about appearance / releases.