The latest models are capable of non-slop code and tolerable prose (OpenAI is much better than Anthropic on the prose but I think Anthropic has a slight edge on code quality). It's really just pre-Astra models that are super sloppy. Annoyingly you get what you pay for.
Also the benchmarks don't really seem to capture this at all. I guess it is difficult to have a benchmark for code quality or writing style.