Problem is that the frontier models are nowhere near 99% reliable. Orchestration and good system design is how you get reliability. Yes, the frontier models still are going to be better by default than open source models. But the LLM is still only a component in a broader system. What's seeming to be actually necessary for any high-usage worthwhile use case is making your model task specific (via fine-tuning / post-training / RL). I build these systems for enterprises. The frontier models are not enough.