The -mini postfix makes perfect sense, probably even clearer than the old "turbo" wording. Naturally, the latest small model may be better than larger older models... but not always and not necessarily in everything. What you'd expect from a -mini model is exactly what is delivered.

The non-reasoning line was also pretty straightforward. Newer base models get a larger prefix number and some postfixes like 'o' were added to signal specific features in each model variant. Great!

Where things went of the rails was specifically when they decided to also name the reasoning models with an 'o' for separate reasons but now as the prefix at the same time as starting a separate linear sequence but now as the postfix. I wonder if we'll end up with both a 4o and o4...