It's the same pre-training, they are just adding more (+ better) SFT, RL, etc. (post-training). Model internal knowledge cut-off is still the same.

It seems we are doing pre-training every 6 months, and post-training every 4-8 weeks now.

I just wanted to emphasize this. Harness is a big part of how things perform thus usually it's harness + model co-design that's important.