OpenAI launched its AI video generator, Sora, and integrated ChatGPT with Apple's Siri during its "12 Days of OpenAI" event. Meanwhile, Google introduced a new quantum chip that solved a long-standing problem, leading to a nearly 5% stock increase. Nvidia expanded in China despite trade tensions and faced an antitrust investigation, resulting in a drop in its stock. Other companies, including Apple and Boston Dynamics, announced new AI features and solutions.