Not the person you're responding to, just a person who still has the original version of the page open in their browser. Quoting from it:

"Kimi K3 is the first open-source model to reach the 2.8-trillion-parameter scale. It is the latest step in Kimi's continued push of model-scale boundaries: in 9 of the past 12 months, Kimi models have set new records for open-source model scale."

The page has definitely changed.

(I'm not sure why you would be skeptical of somebody recollecting something they probably read only half an hour earlier.)

I was skeptical because the 2.6 getting started description doesn’t say open source either. I do however appreciate the correction.