I ran 5.4 Pro on some data analytics (admittedly it was 300+ pages). It took forever. Ran the same on Sonnet 4.6, night and day difference. I understand it's like using a V8 engine for a V4 task, but I was curious. These new models look promising though. I'd rather use something like a Haiku most of the time over the best rated. I'm not a rocket scientist or solving the mysteries of the universe. They seem to do a great job 80% of the time.