Study Mode adapts to you — it remembers that you like real-world examples and shorter sessions, and carries chat memory between conversations. As of 2026 it’s available on every ChatGPT plan.
But adapting the style of teaching is not a model of your knowledge. It can’t tell you which of the forty concepts in your goal you’ve demonstrated, which are shaky, and which one is due for review this morning before it slips.
That state — concept-level mastery plus an FSRS clock per concept — is Bruner’s core data structure, not chat history. It’s what turns “we talked about this once” into “you still know this in March.”