I have been out of commission on work travel and clients but finally have some time tonight to put thought into something I think you may be curious (or frustrated) about — "memory" in AI models.... Two different things get called "memory," and mixing them up causes real confusion. So I thought we would separate them. 1. MEMORY IN A CHAT Term to know: "context window". This is the tool's short-term memory for the chat you are in right now. Everything you have typed sits inside it. Once the conversation gets long enough, the earliest parts begin slipping as if they were lost. That is why a chat that started sharp can drift into sloppy. It is not getting tired. It is losing the beginning. What to do: start a fresh chat for each new task, and paste back in the details that still matter. Easiest way is to ask the model for a "handoff" file to paste into a new project or chat. 2. MEMORY ACROSS CONVERSATIONS ->Claude is the only AI with memory per-Project separation. In other words, your memory from one project won't leak to another project. -> Gemini has the most memory settings scattered across many places, so it is the easiest one to misconfigure without realizing. I think Google has some work to do to make things easier to configure. -> ChatGPT is the one where deleting memories does not fully undo things if the chats remain. So if you are bothered by Chat GPT bringing up "old information", you should delete old chats. More details: Claude. Everything Claude remembers sits in a list of files under Topics in Memory settings, where you can read, edit, or delete each one. Sensitive subjects — health, race, religious beliefs, politics, gender identity and similar are not stored by default, though you can turn them on. Each Project has its own separate memory space, so context in one Project stays separate from other projects and from non-project chats. Turning it off gives you two choices: pause, which keeps existing memory but stops using or making new ones, or reset, which permanently deletes everything including project memories.