The GPT-5.5 Instant in ChatGPT now rivals the most advanced Thinking models in answering health questions, performing better at identifying when urgent care is needed, at requesting context, and at explaining uncertainty. More than 230 million people turn to ChatGPT each week, and the change also affects free users; clinician-led evaluation was key.
GPT-5.5 Instant now matches the most advanced Thinking models on health questions
The GPT-5.5 Instant in ChatGPT now rivals the most advanced Thinking models in answering health questions, performing better at identifying when urgent care is needed, at requesting context, and at explaining uncertainty.
