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“So the feature mostly punishes the exact people who are easier to fingerprint: normal developers doing weird but legitimate things”

What’s the punishment here exactly?



Higher odds of being banned for legitimate usage.


If you are accessing Claude through the listed domains it is not "legitimate use."


for using a proxy service.. wtf


For being flagged as possibly a competitor? They nuke your account.


Returning invalid poisoned different results that were not what you paid for


Output poisoning and/or eventual account bans, if I had to guess.


> What’s the punishment here exactly?

Seeing as how Anthropic cannot stop raising a stink about "illicit Chinese distillation attacks" every month or so, I'd bet money on them either already silently degrading model performance if any of the identification patterns match, or, at the very least, considering it/doing dry runs.

Particularly considering that they've openly stated that the technology to do so exists and that they were going to use it in production on Fable.


They probably run a heavily dumbed down version of the model, same as what they got caught doing with Fable.

And that's also why, as a legitimate customer, want none of it, you never know if you accidentally entered a zone they don't like.


"got caught"

to clarify, this behavior was announced with the model release


The extent got caught.


if by announce you mean shove it somewhere in a pdf with hundreds of pages, yes


https://www.anthropic.com/news/claude-fable-5-mythos-5

This is not hundreds of pages and it gets its own bold headline section.


Wrong. That page is after they walked back because of the outrage. The original was on the PDF as reported in this article:

> If Claude Fable stops helping you, you'll never know

https://jonready.com/blog/posts/claude-fable5-is-allowed-to-...

HN post with 1k+ comments: https://news.ycombinator.com/item?id=48467896


The original announcement page mentioned this. It was very obvious. That's why so many people noticed it immediately, because it was announced.




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