Phenomenal model, not sure what they did, but I have been able to do so much with my $20 plan!
I think what makes it great is that they trained it to write harnesses for the code it writes, so it can test stuff even if the supplied code is not complete.
loading story #49948092
loading story #49948252
A significant part of it is that with Opus 5.5, cache reads are priced at 5% of inputs, instead of 10% for previous models.
If enough people keep saying it I'm sure they will nerf it