My quick (subjective) impression is that GPT-4.5 is doing better at maintaining philosophical discussions compared to GPT-4.0 or Claude. When using a Socratic approach, 4.5 consistently holds and challenges positions rather than quickly agreeing with me.
GPT-4.0 or Claude tend to flip into people-pleasing mode too easily, while 4.5 seemed to stay argumentative more readily.
GPT-4.0 or Claude tend to flip into people-pleasing mode too easily, while 4.5 seemed to stay argumentative more readily.