ChatGPT Memory Has Quietly Changed (Plus & Pro)

If you use ChatGPT Plus or Pro, something important has shifted in how memory works.

This is not a cosmetic update. ChatGPT can now draw on past conversations in a way it simply could not before. Not just preferences you explicitly saved, but relevant material from earlier chats.

This does not apply to ChatGPT Business. There, memory remains deliberately limited, which makes sense organisationally, but is a real contrast in capability.

The short version

ChatGPT now appears to work with three distinct memory layers, on top of its fixed system behaviour:

1. Saved memory
   Explicit, persistent facts you asked ChatGPT to remember. Preferences, recurring projects, long-term details. These live at account level and are manageable in settings.
2. Contextual (conversation) memory
   The implicit memory inside an active chat. This is the familiar “it remembers what we were just talking about” behaviour, bounded by the conversation window.
3. Reference chat history
   A newer layer that allows ChatGPT to retrieve relevant information from past conversations, even if nothing was explicitly saved.

The real change is the third layer.

Reference chat history is retrieval-based, not ambient. Past conversations are consulted when relevant, rather than always being “in mind”.

Why this matters

This subtly changes how ChatGPT behaves over time.

• You don’t have to restate everything.
• Longer lines of thought can accumulate.
• The tool starts to feel less like a reset-on-every-use assistant, and more like a continuing workspace.

For Plus and Pro users, that is a meaningful shift.

For Business users, the contrast is now sharper: less continuity, more containment.

What to do now

The best way to understand this update is to experiment.

• Start a fresh chat.
• Refer to something you discussed weeks ago.
• Notice when it recalls it, and when it doesn’t.
• Toggle memory and “reference chat history” settings and observe the difference.

Once you see the pattern, you will almost certainly start using ChatGPT differently.

That alone makes this update worth knowing about.

ChatGPT Personal vs Business

If you use ChatGPT both privately and at work, you may have noticed this: one conversation seems to carry on over time, the other keeps resetting. Same system, different behaviour. That difference is deliberate, and it matters.

Rob HoeijmakersRob Hoeijmakers