The thing memory still can't do
Memory has gotten genuinely good. OpenAI's Dreaming update (June 2026) reads across years of your chats and builds a profile of you in the background, without being asked.[1] If your question is "does ChatGPT remember me," the answer is now yes.
But remembering you and knowing how to work with you are two different things. Memory stores what you have told it and what it infers from your chats: your job, your projects, the preferences you happened to spell out. It never measures the things you can't easily articulate, like how direct you want the answer or whether you decide fast or weigh every option first. Those are the settings that make an answer feel written for you.
Here is the proof. Even when memory knows a preference you stated outright, OpenAI's own evaluation puts adherence at 71.3% in 2026, and that is OpenAI's own number, not an independent audit.[2] It misses roughly three times in ten on preferences you handed it directly. For the ones you never managed to state, the hit rate is zero, because nothing was ever captured.