>>42693534
You need to actually use this shit a bit to see the signs; to recognize the isms (words, sentences, structures) that models overuse, etc.
Here, for this story, it's not even subtle. The guy probably used an official interface that doesn't let you change parameters or system prompts and just asked the AI to write him a story.
You can tell it’s AI from the first paragraph alone:
>The rooster crowed just as Celestia's sun peeked over the hills, casting golden light across the dew-speckled orchards of Sweet Apple Acres. Inside the farmhouse, the air was thick with the scent of old wood, apple preserves, and the faint tang of last night's cider.
They love starting stories with "the golden rays of the sun" or some variation of it, and
>casting golden light across the dew-speckled orchards
is pure AI phrasing.
"The air being thick with X" is another spammed structure, same for "the faint tang of X."
It's overly descriptive without being evocative, another big tell of weak AI writing.

You also get other isms later:
>"symphony of X and Y"
and the em-dash spam and this >>42692897

You can also use:
https://app.gptzero.me/
It's not always great at detecting AI writing, and retards who roughly know what they're doing can easily get 0–10% on it with pure AI text.
But if it gives you a 100% on a fic, it's definitely AI.
No fic written before the big LLMs existed will ever score higher than 2%. You can test that yourself with older ones.