Rivian's stock surged 15.89% to $19.04 following the debut of its AI chip, RAP1, and Level 4 autonomous driving system during its inaugural AI and Autonomous Driving Day. The company also introduced its Autonomy+ subscription service, which will launch in early 2026, offering a $2,500 prepayment option or a $49.99 monthly fee. Additionally, Rivian released a 'Universal Hands-Free' software update for North American roads, enhancing its autonomous driving capabilities.