People are using AI but not disclosing it. How do you detect it ?

[Reignwyn]

Probably dialogue when it's just super bland and too on the nose all the time.

 

[Lock'n'Key]

Want to add that in stories set in established fictional worlds Ai will just Make Shit Up with no relation to canon yet beyond simply flavour.

Much of it reads like those overly alt-verse fanfictions where the author really needs to go write their own original work rather than cramming every single cool idea they've ever had into a single fanfic.

An example of this (without pointing fingers) would be something like Ai adding an entirely new system of magic to a Harry Potter fic in an overly convoluted, flowery description that eventually has no impact on the plot and is never seen or used again.
(But the pseudo magi-babble 'sounds' really cool.)

Eg: you have a HP character "enchant" an item and Ai suddenly needs the blood of three wolves, a potion of vitality and special made enchanting desk to do it when HP wizards quite literally just wave their wands.

 

[Roquemore]

For a very specific category of giveaway, Claude 4.6 likes to talk ambiguously but pretentiously about characters' emotions in an indirect way, but without any of the other elements that a good writer would use for complicated feelings, like physical symptoms or confused actions. It's hard to describe as a pattern, but it's pretty obvious once you've seen it a few times.

I suspect it was at some point reinforcement trained away from obvious "tell instead of show" writing about feelings, but nobody bothered to train it on actual good writing patterns to use instead, so it instead just gets ambiguous and goes in circles writing a fancy version of "Character X was having Big Feelings, and here is more and more text about how big those feelings are but also no actual details about them so that it seems deeper because you have to guess at it".