Venture capitalist Marc Andreessen reignited the debate over artificial intelligence in healthcare after praising a new OpenAI finding suggesting physicians identified fewer flaws in GPT-5.6’s medical responses than in responses written by doctors. On Saturday, Andreessen posted on X, writing, “AI is already a better doctor than 99.99% of human doctors. This is good news.” His post came in response to OpenAI CEO Sam Altman’s statement highlighting the results of an evaluation of GPT-5.6: “Physicians found fewer flaws in GPT-5.6 responses than physician-written responses.” Earlier, Microsoft Corp. AI CEO Mustafa Suleyman said healthcare was one of the most important applications for AI as Microsoft and Mayo Clinic partnered to develop a healthcare-focused AI model. The collaboration aimed to combine Mayo Clinic’s clinical expertise and de-identified patient data with Microsoft’s AI and cloud capabilities. Meanwhile, U.S. healthcare systems expanded the use of AI chatbots, with Hartford HealthCare launching Patient GPT from K Health, and Sutter Health and Reid Health introducing Epic’s Emmie platform. Last year, ARK Invest CEO Cathie Wood highlighted AI’s growing healthcare impact after sharing research from Mass General Brigham showing AI could estimate biological age and improve cancer survival predictions through facial image analysis.