There are two different memory systems for ChatGPT. The older one is the "saved memories" you mention, where it would occasionally jot down some notes when it t

There are two different memory systems for ChatGPT. The older one is the "saved memories" you mention, where it would occasionally jot down some notes when it thought something was worth remembering or when you specifically told it to remember something. The newer system has access to all your chats, most likely through RAG, though I don't think OpenAI has publicly explained how it's implemented. If it's RAG, then it's more like it has an ability to do a semantic search on your conversations and view the top results than actually being aware of everything you wrote at all times.