I still am struggling to understand why they informed the government about something that is known to be an issue in every LLM. There is no LLM that cannot be jailbroken, so unless this means that we have reached the absolute maximum publicly accessible US made LLMs are allowed to operate at with GPT 5.5, this is not grounded in any sane regulation attempt.

Does anyone know what limits Fable 5 has overstepped in the eyes of the government? Parameter count? Certain benchmark results? Training computer?

Cause if it’s just the ability to assist with cyberattacks and being jailbreakable, there is no model previously released that isn’t equally guilty.

Remember that for GPT 5.5 and 5.4, OpenAI also restricted the cybersecurity focused use under designated models, otherwise rerouting to 5.3-codex like Fable did with Opus 4.8. And both OpenAI models can also be jailbroken all the same.

Basically, what was the reason to tell the government now and not with Opus 4.5 or GPT 5.4? sama has been doing the rounds with apocalyptic predictions…

The simple answer is that Trump has a stick up his ass against Anthropic and is also fond of stock market manipulation. No need to get too deep when it comes to dealing with that orange shmuck.

Claims of retribution aside, one strawman is that Mythos is likely the most capable model that's usable by folks like the NSA [1], and decision-makers across the USG and industry partners have seen a stream of reports of Mythos successfully finding serious vulnerabilities over the past couple months due to Glasswing.

So even if GPT 5.5 is just as capable in these scenarios (which, imo, it largely is), it is not known by the government apparatus as having the same capabilities.

Personally, I think we crossed the threshold of capabilities with Opus 4.6 [2], which translated to an even more capable open-weight GLM 5.1 (which it is rumored to have distilled Opus 4.6) [3][4]. But the USG and its partners aren't fully rational actors with perfect data, so it's possible they're only viscerally aware of these capabilities in the context of Mythos.

[1]: https://www.reuters.com/business/us-security-agency-is-using...

[2]: Opus 4.6 was used for https://www.noahlebovic.com/testing-an-autonomous-hacker/

[3]: See GLM 5.1 scoring in https://www.cybergym.io/cybergym/

[4]: https://dualuse.dev/posts/chinese-models-are-sometimes-bette...

The reason is pretty obvious. Anthropic tried to play hardball with the government and now they are under their thumb for scrutiny of any and every little thing they do.

That's what this admin is known for. If you do even what a normal person would think is sane but they don't like it, well now they need to make you bow down and break you so you "learn your lesson".

It doesn't help that they themselves marketed this model as being especially dangerous in the publics hands. If this was just another model drop and none of the fear mongering I don't doubt this probably wouldn't have had any issues.

Its not Fable 5 that overstepped in the eyes of the US government.

It's Anthropic.

This is transparent revenge for them daring to try and push back a little on enabling war crimes.

Reminds me of people freaking out about the Grok Bikini thing, but GPT and Googles image model they all do the same behavior. Clearly biased against Elon Musk despite it being a problem for every single image model out there.