Core Insights - Rivian Automotive held its first "Autonomous Driving and AI Day," revealing advancements in custom chips, onboard computers, and AI models to support autonomous driving features in new models [1][5] - The company's stock fell approximately 3% during the event and further declined by up to 9% after OpenAI announced its latest AI model [1][5] - Rivian plans to launch the "Autonomy+" subscription service in early 2026, offering two pricing models: a one-time payment of $2,500 or a monthly fee starting at $49.99, which is lower than Tesla's pricing for its Full Self-Driving (FSD) service [1][5] Technology Developments - The new Advanced Driver Assistance System (ADAS) will continuously optimize performance through reinforcement learning as driving mileage accumulates [2][6] - Unlike Tesla, Rivian's upcoming R2 series will include LiDAR and radar sensors, aiming for Level 4 (L4) autonomous driving capabilities as defined by SAE [2][6] - Rivian's self-developed chip, set to launch in 2026, will feature multi-chip module packaging with a memory bandwidth of 205 GB/s, crucial for AI applications [3][8] Market Position and Challenges - Rivian is under pressure due to slowing sales growth in the U.S. electric vehicle market and the need to demonstrate future growth potential to investors [4][8] - The termination of the $7,500 federal tax credit for electric vehicle consumers has contributed to a decline in U.S. EV sales [4][8] - Despite a 25% increase in stock price this year, Rivian's stock is down over 80% compared to its IPO price in 2021 [4][8]