All the examples of "warmer" generations show that OpenAI's definition of warmer is synonymous with sycophantic , which is a surprise given all the criticism against that particular aspect of ChatGPT. I suspect this approach is a direct response to the backlash against removing 4o.
From whom?
History teaches that the vast majority of practically any demographic wants--from the masses to the elites--is personal sycophancy. It's been a well-trodden path to ruin for leaders for millenia. Now we get species-wide selection against this inbuilt impulse.