Maybe not 10x yet, but deepcoder has done some impressive things recently. Instead of a generic LLM, they have a relatively smaller one which is coding specific and gpt4-class in quality. This makes it cheaper. In addition, they can do caching which ~10x reduces the cost of follow-up request. And there are still improvements around Star, which reduces the need for learning datasets (models can self-reflect and improve without additional data)

So while we're not 10x-ing everything, it's not like there's no significant improvements in many places.