ChatGPT silently mines your old chats to shape new answers — here's the 2-minute fix

Ok_Negotiation_2587 · reddit · 2026-09-13

A Reddit user found ChatGPT kept steering a law-firm pitch review toward a "friendly, casual" tone — caused by a months-old coffee-brand copywriting chat it had quietly absorbed. ChatGPT memory has two layers: editable saved memories, and an invisible mechanism that reads your past conversations to infer job, preferences and style, then applies them to new chats without any disclosure. The post lists telltale symptoms and a free fix: audit Settings → Personalization → Memory, use Temporary Chats for unbiased reads, and prompt the model to state its assumptions about you and where the answer would differ without them.

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