It would have been extremeley nice if the original article had also included Sol and Terra in the testing.

(Also would have been nice if they included the equivalent Anthropic models for comparison as well, but it's not quite as relevant.)

Luna is interesting because OAI dropped the price by 5x. Astra is interesting because it's OAI's frontier model. They are asking a specific question about Luna's usefulness compared to a frontier model. They they answer that question in their article which was straight to the point and not cluttered with information about mid-tier models.