The restriction also applies to the company's Mythos models.
Fable 5 is not back.
Apparently Anthropic’s non-citizen researchers can’t use Mythos/Fable 5 due to the ban, but they can still build more powerful models like Mythos 6 or Fable 6.
If that’s true, I don’t think the ban makes much sense.
Many users objected to Anthropic barring non-citizen researchers from Fable 5 as nonsensical security theater and a pointless export control that harms researchers without any real benefit.
No Digg Deeper questions have been answered for this story yet.
@Yuchenj_UW A lot of things in this mixed-up crazy world don't make sense.
Fable 5 is not back.
Apparently Anthropic’s non-citizen researchers can’t use Mythos/Fable 5 due to the ban, but they can still build more powerful models like Mythos 6 or Fable 6.
If that’s true, I don’t think the ban makes much sense.
@AndrewCurran_
@Yuchenj_UW Typical politicians not understand the tech they are trying to regulate
@Yuchenj_UW The restriction is to 'US persons' not 'US citizens' ( under the EAR ) so folks like Karpathy can use it.
Others can contribute their expertise but they cannot access the executing model or the weights. No matter how you look at it, it has to be super painful for them.
@Yuchenj_UW Impossible to ban “thinking” and writing code in the U.S. First Amendment.
@Yuchenj_UW This is why they announced the point release. :P
@Yuchenj_UW It's a lab that does research. It was "banned" from public use. That doesn't mean the research suddenly ends. It's a lab. It's not a product printer despite the fact that a lot of these labs present themselves that way. It's just not what it is. It never has.
@Yuchenj_UW Bans never make sense
@Yuchenj_UW Imagine a world where AI-research requires a security clearance
@Yuchenj_UW It never made sense. The most important thing right now is leveraging this tech to harden all our critical surfaces (including power plants and other grid infrastructure.) Attacks will be coming in force from every direction when the next gen of OSS frontier models drop.
@Yuchenj_UW It will be back, I have insider info
@Yuchenj_UW It didn't make sense in the first place. Export controls aren't the right way to regulate this technology just like it wasn't the right way to regulate encryption in the 90s, the cat is fully out of the bag.
@Yuchenj_UW Since when has American (or almost any country’s) politics ever made actual sense?
@Yuchenj_UW Hey maybe they will pass an ban bill that requires 100% transparency into why. Then we can start sticking it to game devs and providers for gaming bans too. :P
@Yuchenj_UW … why not just rebrand fable 5? Hello?
@Yuchenj_UW so you can build mythos 6 but cant touch 5? sure that tracks
@Yuchenj_UW You can’t have fable 5 🥹
you can have fable 6 😵
Worth separating two different things here: the restriction is on public/foreign-national access to Fable 5/Mythos 5’s specific (already-flagged) capability, not a blanket ban on R&D. Researchers building Mythos 6 internally isn’t contradictory — when Mythos 6 ships, it presumably gets its own access review based on what it can do. It’s model-specific deployment control, not “no AI research for non-citizens.”
@Yuchenj_UW GPT-5.5 usage must be going through the roof.
@Yuchenj_UW This ban is kinda sus, like what’s the real point here?