By definition, the model with the best performance will be on the pareto frontier (regardless of cost).

No. Pareto frontier is cost performance tradeoff.

What jonas21 is stating is correct. If you have the absolute best performance, you are automatically on the Pareto frontier because you’re the most cost effective one (or the only model) on that performance tier.

	▲	seizethecheese an hour ago \| parent [-]
		Huh, I guess you're right, but I interpreted jonas21's comment in relation to the above comment, which was about all models running on Max (which implies this would be a comment relating to all points on the pareto curve).