OpenAI has introduced 'Health in ChatGPT,' a feature connecting users' health data to wellness apps and medical records. The service is available to U.S. users, with premium subscribers having access to more advanced health advice. This is because OpenAI uses different models for paid and free users, with the more powerful GPT-5.6 Sol model reserved for premium subscribers. As a result, free users will receive less accurate health advice. This disparity in health advice may have significant implications for individuals seeking medical guidance.