Tags: GPT-5.5 Instant

OpenAI has launched GPT‑5.5 Instant, a new model for ChatGPT that cuts hallucinated answers by more than half on high‑stakes topics like medicine, law and finance. The update delivers shorter, cleaner replies and introduces “memory sources” that let users see and edit the context behind personalized answers. GPT‑5.5 Instant is available to all ChatGPT accounts, including free users, while enhanced personalization features currently roll out to Plus and Pro subscribers on the web and will expand to mobile and other plans in the coming weeks. Read more

OpenAI has switched ChatGPT’s default engine to GPT-5.5 Instant, a model that slashes hallucinated statements by more than half in internal tests and trims inaccurate replies by over a third. The upgrade also delivers leaner, more direct answers, quicker file searches and a new “memory sources” feature that lets users see and manage the context used to personalize responses. Plus and Pro subscribers receive the change today; other tiers will follow in the coming weeks. Read more