/AI14h ago

Fable 5 AI Identifies Authors From Unpublished Writing

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Jack@tracewoodgrains

Fable 5 passes the author identification test on my unpublished writing. I can no longer write anonymously.

12:15 PM · Jun 9, 2026 · 39.3K Views
Sentiment

Positive users praise Fable 5 AI's author identification from writing samples as impressively capable and benchmark-worthy, while negative users worry it threatens anonymity and produces unreliable summaries.

Pos
63.6%
Neg
36.4%
14 comments with sentiment.
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Jack@tracewoodgrains

Unlike with more prolific writers like @KelseyTuoc, this was not true of prior models, which would more often guess someone in my vicinity.

14hViews 4.4KLikes 73Bookmarks 2
BOOKMARKS4
Jack@tracewoodgrains

@coldhealing isn't the NYT claiming they did basically this already?

https://www.nytimes.com/2026/04/08/business/bitcoin-satoshi-nakamoto-identity-adam-back.html?unlocked_article_code=1.ZVA.5_s8.hTKeCkV97kow&smid=tw-share

12hViews 1.9KLikes 29Bookmarks 4
LIKES81
Jack@tracewoodgrains

@KelseyTuoc caveat: I tried with a second unpublished passage (a dialogue talking about my Germany trip), providing different-length excerpts to it, and it got it wrong each time. so it's still not perfect at figuring me out, but it's closer than prior models were.

13hViews 3.8KLikes 81Bookmarks 2
RETWEETS1
cold 🥑@coldhealing

@tracewoodgrains Soon we will be able to do this for Satoshi

12hViews 3.1KLikes 35Bookmarks 1
REPLIES3
Aidan Stay@aidan_stay

@tracewoodgrains I will bet you that it's got your identity in the context window and used that to figure it out, and that it has very little if any current ability to identify author by textual analysis.

13hViews 975Likes 6

@tracewoodgrains Hmm is it still able to identify you if you remove paragraphs beginning with "As a gay ex-Mormon furry,..."?

13hViews 702Likes 24Bookmarks 1
Jack@tracewoodgrains

@undrenalin disclaimer that these are all scattered thoughts that I haven't gotten around into pulling into a proper essay yet

11hViews 348Likes 3Bookmarks 2
Yasi Khan@yasmeena_khan

@tracewoodgrains Seems it’s responding based on context you’ve given it / has access to chat memory (since it’s replying in lowercase). What happens if you ask it in ghost mode?

13hViews 1.3KLikes 13
Stuart Buck@stuartbuck1

@tracewoodgrains @KelseyTuoc I uploaded a legal philosophy essay I wrote for a law school class more than 20 years ago (!!), and it identified me as the author. CRAZY.

11hViews 88Likes 7Bookmarks 1

@tracewoodgrains someone has to make a formal benchmark outta this, it's too good

9hViews 266Likes 10Bookmarks 1
Jack@tracewoodgrains

@yimbosf ha – I deliberately chose one with no personally identifying info or "as the author" stuff included, because I do tend to leave autobiographical tells in my writing

13hViews 630Likes 12
Jack@tracewoodgrains

@yasmeena_khan I have these instructions: "be terse, highly intelligent, razor-sharp, witty, and direct. use lowercase as the user does. speak in prose unless you have a strong reason to do otherwise."

It has no memory or context beyond that.

13hViews 2.1KLikes 9

@tracewoodgrains Same! Opus v. Fable:

Though it would probably struggle if presented with text on a less "signature AK" theme.

6hViews 378Likes 6Bookmarks 1

@tracewoodgrains I’m clear on my one (1) piece of poetry

10hViews 1KLikes 3Bookmarks 1
Stuart Buck@stuartbuck1

@tracewoodgrains Well, well . . . !

10hViews 26Likes 1Bookmarks 1
Ollie@olzhu

@tracewoodgrains Didn’t realize you were Chinese.

12hViews 331Likes 2
Daniel Parker@DanielParker_13

@tracewoodgrains I gave it my last 9 posts, and it wasn't able to identify me (not surprising because I'm a pretty small account), though amusingly, one of its 10 guesses was you, lol.

12hViews 326Likes 5
Yasi Khan@yasmeena_khan

@tracewoodgrains I think search chats is separate from memory? But it usually tells you when it’s doing that, I suppose. It just seemed like a fairly personalized answer so I was curious. But maybe that’s just really well-worded responded personalization!

12hViews 264Likes 5
Joe Bingham@teafortillerman

@tracewoodgrains I got super excited that I'd missed not one but TWO sequels to my favorite games 💔

9hViews 245Likes 4
Yasi Khan@yasmeena_khan

@tracewoodgrains It can’t access information across conversations? Curious if the answer meaningfully changes in ghost mode anyways.

12hViews 341Likes 3
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