I think relying on the vocabulary to indicate AI is pointless (unless they're actually using words that AI made up). There's a reason they use words such as those you've pointed out: because they're words, and their training material (a.k.a. output by humans) use them.
No American used "delve" before ChatGPT 3.5, and nobody outside fanfiction uses the metaphors it does (which are always about "secrets" "quiet" "humming" "whispers" etc). It's really very noticeable.
It's clearly AI writing ("hum", "delve") but oddly I don't think deep research models use those words.
I think relying on the vocabulary to indicate AI is pointless (unless they're actually using words that AI made up). There's a reason they use words such as those you've pointed out: because they're words, and their training material (a.k.a. output by humans) use them.
No American used "delve" before ChatGPT 3.5, and nobody outside fanfiction uses the metaphors it does (which are always about "secrets" "quiet" "humming" "whispers" etc). It's really very noticeable.
https://www.nytimes.com/2025/12/03/magazine/chatbot-writing-...
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