CNBC·2026-01-08 01:21Group 1: Stock Movements and Valuations - Alphabet's shares increased by 2.4%, resulting in a market capitalization of $3.89 trillion, surpassing Apple's market cap of $3.85 trillion, which decreased by 0.8% [1][2] - This marks the first time since 2019 that Alphabet has outvalued Apple, indicating a shift in market dynamics, particularly in the artificial intelligence sector [2] Group 2: AI Developments and Competitive Landscape - Apple's AI voice assistant, Siri, is set for a delayed launch in 2025, lacking a specific release date, which highlights Apple's struggles in the AI race [2] - In contrast, Alphabet's rapid deployment of new AI models has attracted more users and investor interest, making it the top-performing stock among major tech companies last year [2] - Tesla's CEO Elon Musk acknowledged the competitive pressure from Nvidia's new AI reasoning model, Alpamayo, but suggested it would not pose a significant challenge for several years [3]