OpenAI expands into Asia with a new Tokyo office and specialized GPT-4 model, Stanford's AI Index reveals AI surpasses humans in some areas but lags in advanced math and planning, former U.S. Treasury Secretary Steven Mnuchin considers partnering with an AI company to rebuild TikTok's algorithm amid acquisition efforts, Tesla announces a workforce reduction of over 10%, and Adobe introduces an AI assistant for reading PDFs in Acrobat.