My own experience is that Opus 4.8 has an adversarial-teacher voice, unsolicited grading as if I submitted an essay for grading, declarations about the "real" issue, and constant "honest notes" self grading its own responses even before it answers. I can't stand its tone. We can't have a normal chat.
While Fable reverts to Opus for simple questions like "What is digestion?"
While Fable reverts to Opus for simple questions like "What is digestion?"