GPT-5.5 Health Intelligence Expansion

OpenAI introduces GPT-5.5 Instant to enhance ChatGPT's health and wellness responses with improved reasoning, context, and physician-informed evaluations.

One continuously updated timeline instead of dozens of separate articles. New developments are appended as the story evolves.

1. UpdateJun 18, 2026, 11:00 AM 82%

   OpenAI launches GPT-5.5 Instant to enhance ChatGPT's health and wellness responses with physician-informed evaluations.

   OpenAI introduces GPT-5.5 Instant to enhance ChatGPT's health and wellness responses with improved reasoning, context, and physician-informed evaluations.

   Read the full story →