OpenAI launched ChatGPT for Clinicians, a free workspace for verified U.S. physicians, nurse practitioners, physician assistants, and pharmacists, featuring real-time citations from peer-reviewed sources, automatic CME credit tracking, and HIPAA-compatible privacy terms that exclude conversations from model training. Alongside the launch, OpenAI released HealthBench Professional, a benchmark of 5,000 realistic clinician chat tasks built with 262 physicians practicing in 60 countries; GPT-5.4 scored 59.0 versus 43.7 for physician-written baselines given unlimited time and web access. Physician advisors reviewing roughly 7,000 pre-release conversations rated 99.6% of model responses safe and accurate, and OpenAI is offering HIPAA BAAs to qualifying organizations.