Vidgen, Bertie, Abby Fennelly, Evan Pinnix, Chirag Mahapatra, Zach Richards, Austin Bridges, Calix Huang, et al. “The AI Productivity Index (APEX)”. SuperIntelligence - Robotics - Safety & Alignment 2, no. 4 (January 22, 2026). Accessed May 21, 2026. https://s-rsa.com/index.php/agi/article/view/17205.