5.6-sol-medium shows cost efficiency over 5.5-xhigh in ExploitGym

5.6-sol-medium achieves 16% intended exploits at $19.62, versus 5.5-xhigh's 15% at $36.80—about 47% lower cost per evaluation. The data suggests 5.6-sol-medium may serve as a more cost-effective replacement for 5.5-xhigh.