CITI'S TAKE The latest frontier models' gains in both performance and cost per task highlight improving model efficiency and inference economics, potentially reinforcing a longer-term economic advantage over less efficient open- weight alternatives. The top proprietary model released this week lifted the AA intelligence frontier 9% and lowered AA task costs by 55% versus its predecessor (Figure 15). This acceleration of frontier model releases continues to rewiden the gap with open models (Figure 10). The g ...