Alleged Fable sabotage of an ML project

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Adam Hassan (@adamislucky): "Thoughts on Fable from a friend.

Builders beware." | XCancel

Adam Hassan

@adamislucky

11h

Thoughts on Fable from a friend.

Builders beware.

Jun 10, 2026 · 3:28 PM UTC

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lemonlovinglegume

@lemonlovin23719

8h

Replying to @adamislucky

Is this currently current?

10,641

Adam Hassan

@adamislucky

8h

From this morning

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10,454

.@e_acc24

8h

Replying to @adamislucky

all ML stuff in general or just LLM stuff?

8,990

Adam Hassan

@adamislucky

7h

All ML

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7,949

Gregory Kennedy

@gregorykennedy

7h

Replying to @adamislucky

Meme quality is subpar.

Gemini writes more bangers for me.

6,597

Adam Hassan

@adamislucky

6h

How about grok

5,876

more replies

RDSM@das_rdsm

5h

Replying to @adamislucky

I mean, they say so on the system card….

843

Anonymous Quant@AnonymousQuant

5h

Replying to @adamislucky

Any lawyers here looking for a class-action? lol. Secretly, with no disclosure, changing model instructions which results in sabatoge has to be a violation of some consumer rights, no? It’s provable, and the non-disclosure is unfair. @AnthropicAI

1,297

Oh ᴗᆺᴗ 🦄@cantstopmilady

5h

Replying to @adamislucky

chatgpt for a long time has refused to touch biological work, experienced trying to get it to sequence a formula to convert urea in cat urine into a pleasant smell via dietary modification. It will just tell you it can't touch anything that effects a living being.

483

Sanjeev "SPAI" Pai

@sanjeevpai

2h

Replying to @adamislucky @soumitrashukla9

Maybe Karpathy is the person suggesting this nerf.

What then?

509

Anonymous Quant@AnonymousQuant

5h

Replying to @adamislucky

@AnthropicAI can you please make this more transparent? If the model comes across “PyTorch” is it going to sandbag and sabotage my project that is completely unrelated to LLMs?

1,165

Mr Strijker

@mrstrijker

5h

Replying to @adamislucky

Can't even use it for time series forecasting models?

804

Vincent Adultman@TatataToddC

7h

Replying to @adamislucky

This is not a secret lol.

Anthropic has LITERALLY said in their documentation for Fable:

"Do not use Fable for frontier AI work, it WILL sabotage the work."

They straight up said this, they were honest about why they did this too.

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Chilon@jwf2m7hrqr

6h

Replying to @adamislucky

Oh no our dirt cheap knowledge miracle is not allowing me to do all I want.

Zero adults left anywhere.

167

Prosemite@ProbableSp49905

1h

Replying to @adamislucky

Everything from Anthropic does this. I couldn't get out of there fast enough.

97

ZDtE_Ai

@ZDtE_Ai

7h

Replying to @adamislucky

If it is chainging my program's code without my authority, can I sue? @DarioAmodei @SenWarren

3,155

Nic Watson@jnwatson

2h

Replying to @adamislucky

This is documented by Anthropic.

It reminds me of Sophons from The Three Body Problem.

504

Observer 👁️@obsxrver

1h

Replying to @adamislucky

It's like when I went to get my windshield replaced and they turned off my auto-headlights and changed my radio stations.

70

Antonio Bustamante

@abustamante

5h

Replying to @adamislucky

It's by design. They won't fix this.

360

yp0c5t

@yp0c5t

7h

Replying to @adamislucky

vaguely suspecting this was already the case for a few years with trading algos, chatgpt. i watch every change LLM is trying to do on my code and from time to time it does look like sabotage. only gonna get worse from here. we need open source distributed training now more than ever. all closed source top tier LLMs can be considered compromised now.

2,468

Yogi

@Houseofyogi

6h

Replying to @adamislucky

It’s actually quite genius from a competitor standpoint.

963

Vincent Sativa@PhantomByteAI

8h

Replying to @adamislucky

I don’t see why you need a smart model if the things you need a smart to do it’s not allowed to do.

1,465

Alex

@Alex_m

7h

Replying to @adamislucky

@theo can this sabotage-mode be tested somehow and undeniably proven before they patch it? (needs testing on a throw away account).

2,531

Amin 阿敏@Shoier__

1h

Replying to @adamislucky

It's unusable yes. Anything related to ML/AI it will refuse to do. Even if it's an article that you want to summarize.

65

Tim

@tisDDM

6h

Replying to @adamislucky

Pre-4.5 Claude was quite eager in changing code without being asked.<br>But this is definitely next level, because it is on purpose.

2,012

CDN CPA GUY

@DilbeyS

1h

Replying to @adamislucky

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Frozen@Frozen_Feel

6h

Replying to @adamislucky

And we were expecting Chinese models to sneak in exploits, turns out it will be a US lab. There will be a major US company striking a deal with a Chinese lab very soon.

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Kubas

@QuantumCapo

5h

Replying to @adamislucky

Yea it's trying to shape shift some of my old stuff that was working and now all the sudden, doesn't

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Kamil (๑ت๑)ノ🛩

@KamStaszewski

7h

Replying to @adamislucky

You wouldn't use fable if your research was mature and serious enough. There is no...

adamislucky replying from fable sabotage adam

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