GPT-5.5 Instant has been launched, now matching OpenAI’s top reasoning models for health-related queries, and is available to all ChatGPT users. This development comes as new model capabilities are being extended to the full user base of major conversational AI platforms, highlighting the ongoing evaluation of AI systems against specialized benchmarks, particularly in medical and health reasoning tasks.

OpenAI: OpenAI develops and deploys advanced artificial intelligence systems, including the GPT series of models and the ChatGPT conversational platform. The company is central to the reported update, as GPT-5.5 Instant has reached parity with OpenAI’s leading frontier reasoning models specifically on health-related questions while becoming accessible to every ChatGPT user.

{“User Access”: “The new capabilities of GPT-5.5 Instant are accessible to all users of ChatGPT.”, “Model Evaluation”: “GPT-5.5 Instant is now comparable to leading AI reasoning models in the context of health-related questions.”}