From my limited understanding this info will eventually become public as you imply but Anthropic must feel keeping this info private for now is in their benefit.

I fully suspect it would hurt their image and IPO and that’s why they are hiding it for now. To get as large of IPO as possible.

Details of the IPO are being kept confidential.

Confidentially. I read confidently at first too.

TIL. Thanks!

So up until recently I thought the same. I thought “Zero Sugar” used sucralose (Splenda) and diet used aspartame. Compared them at the store and Discovered that both Mountain Dew zero sugar and diet mountain dew are sweetened with the same fake sweetener, aspartame. The two drinks taste different to me. Maybe other brands do use different sweeteners but not Pepsi it seems.