> Despite the original title, a lot of what we learned comes to how Opus evolved and the ability to reason. And also the fact that Haiku is quite capable if scoped properly, that's the whole purpose of the article.

I think you're misrepresenting the whole thing. The blog post boils down to introducing a specialized triage step which is then offloaded to a cheap model. The cost savings come from skipping the expensive model. It has absolutely nothing to do with what choice of expensive model is being used. You could write the same blog post by completely ignoring and omitting the expensive model.