OpenAI Launches ChatGPT for Clinicians - Free for US Doctors, Nurses, and Pharmacists

OpenAI has launched ChatGPT for Clinicians, a free platform providing verified doctors, nurses, physician assistants, and pharmacists in the United States with access to healthcare-tuned AI models. The tool aims to streamline administrative tasks that burden medical professionals, including generating referral letters, prior authorisations, and patient instructions. According to OpenAI's testing, physicians rated 99.6% of the system's responses as both safe and accurate. Alongside the clinical tool, OpenAI introduced HealthBench Professional, a new evaluation framework for assessing AI model performance in healthcare settings. The benchmark measures models across three core clinical workflows: care consultations, documentation, and medical research. It uses physician-authored conversations and employs multi-stage adjudication to ensure rigorous evaluation standards. In initial testing, OpenAI's GPT-5.4 model achieved a score of 59 on HealthBench Professional, outperforming competing models including Claude Opus (4.7), Gemini 3.1 Pro, and Grok (4.20). The benchmark represents a strategic move beyond the product launch itself—by establishing what could become an industry standard for clinical AI evaluation, OpenAI positions itself to define the competitive landscape in healthcare AI. The free tier strategy appears designed to drive adoption whilst gathering real-world usage data from medical professionals. If HealthBench Professional gains acceptance as the standard evaluation metric for clinical AI, other AI laboratories will effectively be competing on OpenAI's chosen metrics and methodology.