Since Opus is a big yapper, and apparently Haiku erodes into silence, sparkles, and 🌟's, I wondered what would happen if you looked at the Backrooms Limit of
OpHai (Opus3 <->Haiku 3.5)

Opus 3 (claude 1) began adopting some of Haiku 3.5's (claude 2) phrases and ascii art/text structure more than the other way around

For example, Opus began using the word 'pulsating' which isn't something it says in Opop backrooms, but it is something Haiku says often.

Haiku also uses tinier ascii boxes and Opus began doing that as well

here are a few examples from the convo early-ish on