Marc Andreessen Says AI Is 'Already a Better Doctor Than 99.99% of Human Doctors'

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.

AI Doctor Claim Sparks Debate On Saturday, Andreessen posted on X while reposting OpenAI CEO Sam Altman’s comments about the company’s latest AI model. “AI is already a better doctor than 99.99% of human doctors.

This is good news,” Andreessen wrote.

His post came in response to 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,” Altman said.

AI is already a better doctor than 99.99% of human doctors.

This is good news. — Marc Andreessen 🇺🇸 (@pmarca) July 12, 2026 Read Also: ChatGPT And Copilot Are Becoming Americans' First Stop For Medical Questions— But Trust Still Lags AI Healthcare Boom Earlier, Microsoft Corp. (NASDAQ: MSFT ) 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 to improve treatment decisions and patient outcomes.

Meanwhile, U.S. healthcare systems were expanding the use of AI chatbots to provide faster medical guidance.

Hartford HealthCare launched Patient GPT from K Health, while Sutter Health and Reid Health introduced Epic’s Emmie platform.

The tools operated within HIPAA-protected environments and used patient records to support scheduling, medical information access and physician workflows.

Last year, ARK Invest CEO Cathie Wood also 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.

Wood said AI had a "profound application" in healthcare, pointing to its potential to accelerate medical research, diagnosis and drug development.

The developments reflected growing investment and adoption of AI tools across healthcare, while debates continued over accuracy, privacy and the role of AI alongside physicians.

Disclaimer: This content was partially produced with the help of AI tools and was reviewed and published editors.

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