The US government, citing national security authorities, has issued an export control directive to suspend all access to Fable 5 and Mythos 5 by any foreign national, whether inside or outside the United States, including foreign national Anthropic employees.
The net effect of this order is that we must abruptly disable Fable 5 and Mythos 5 for all our customers to ensure compliance.
Access to all other Claude models is not affected.
We apologize for this disruption to our customers. We believe this is a misunderstanding and are working to restore access as soon as possible.
Read our full statement: https://www.anthropic.com/news/fable-mythos-access

As a result of a US government directive, we are suspending access to Claude Fable 5 for all users. You can continue to use all other Claude models.
Here’s what this means for you:
Across Claude products, new sessions will run on your selected default model or Opus 4.8, and existing Fable 5 sessions will end with an error.
On the Claude Platform, requests to Fable 5 will also return an error. Please update your integrations to other Claude models.
We know this is a disruption to your workflows; we appreciate your patience and support.
Anthropic: The US government, citing national security authorities, has issued an export control directive to suspend all access to Fable 5 and Mythos 5 by any foreign national, whether inside or outside the United States, including foreign national Anthropic employees.
The net effect of

Berkeley math professor:
“Today, the more successful a public high school is at preparing its students, the lower its graduates' chances of getting into top UC campuses like Berkeley and San Diego.”
Berkeley admitted 45% of applicants from a high school where nearly 94% of “students failed to meet the state standards in mathematics.”
It admitted less than 14% of applicants from a school where “nearly 100 percent of its students in AP Calculus BC pass the national exam with a perfect score of 5.”
The Free Press: California universities dropped the SAT to help low-income and minority students. The policy is doing the opposite, writes Svetlana Jitomirskaya, a professor of mathematics at UC Berkeley. https://www.thefp.com/p/bring-back-the-sat?utm_campaign=trueanthem&utm_medium=organic-social&utm_source=twitter

Ro Khanna is a resentful and economically illiterate centimillionaire who was just handed wealth by his family, which is why he dislikes people who create wealth by delivering innovations like electric cars and satellite internet:
Ro Khanna: Brad, a 5% tax on Elon's trillion net worth would literally pay for free college and trade school for every American.
And with the market's growth, he still would be worth over a trillion dollars!
You don't think that's worth it?

Because this is happening to Anthropic, the temptation for many will be to say: Play stupid games, win stupid prizes. They have relentlessly raised the regulatory temperature in Washington by inviting far-reaching controls of frontier models. They made this bed and now they have to lay in it.
But this decision by the Trump administration should not be judged on a desire for payback politics, but on the merits, and specifically what it means for America's broader AI objectives.
In that regard, this action is truly outrageous. How exactly is the government planning on even going about verifying everyone who uses this specific model to ensure compliance? That alone raises huge flags.
Between the latest Executive Order shifting more control to NSA, and the recent chatter about quasi-nationalization / equity stakes, and now this action, we are talking about a significant escalation in the politicization of AI and centralization of control over advanced computation in this country. And this is all being done by an administration that had previously made acceleration and winning the great AI race a priority.
We're moving backwards now.
Anthropic: The US government, citing national security authorities, has issued an export control directive to suspend all access to Fable 5 and Mythos 5 by any foreign national, whether inside or outside the United States, including foreign national Anthropic employees.
The net effect of

According to Grok, Andrej Karpathy is an EB-1 extraordinary ability green card recipient, not a US citizen. Thus under these new restrictions he is not permitted to use, or work on, Mythos 5 or Fable 5 as of 5:21pm tonight.
Andrew Curran: From the statement:
'The US government, citing national security authorities, has issued an export control directive to suspend all access to Fable 5 and Mythos 5 by any foreign national, whether inside or outside the United States, 𝘪𝘯𝘤𝘭𝘶𝘥𝘪𝘯𝘨 𝘧𝘰𝘳𝘦𝘪𝘨𝘯

⚡️This was a sovereignty collision, and Anthropic lost.
The jailbreak was probably the trigger, not the true object.
The true object is control over the deployment of frontier cognition before the state has absorbed the defensive, intelligence, and cyber implications of that cognition being globally available.
Anthropic’s mistake, if reporting is right, was treating the government pause request like a normal policy disagreement.
A frontier lab cannot tell the national-security state to pound sand after the state has decided the model creates adversarial uplift. That immediately converts a technical dispute into a power dispute. Power disputes with the U.S. government do not end with the company setting the rules.
The government likely panicked, but the panic came from a real structural fear: once a model is strong enough to give skilled operators leverage, safeguards become legally and politically insufficient. No one in government can bet national defense on “we think jailbreaks are narrow.” The question becomes: what happens when the best adversarial user finds the non-narrow one before CISA, NSA, Anthropic, or the defense ecosystem adapts?
That is why the “few weeks” line matters. The state is buying time to ingest the model’s defensive utility before the rest of the world gets equal access. That is the arms-race logic. Commercial release cannot front-run sovereign hardening anymore.
Fable comes back, but the frontier era just changed.
Access will probably return in a tiered, monitored, more identity-bound form. U.S.-verified users first. Enterprise and government customers first. Foreign national access constrained or delayed. Cyber capability harder-gated. More retention. More surveillance. More pre-release state review. More quiet coordination. Less “launch and patch.” More “clear and deploy.”
The bigger consequence is industry-wide. Every frontier lab just learned the actual rule: cooperate before launch or get governed after launch. The next models will go through government review windows that look voluntary on paper and mandatory in practice. The state will not need formal nationalization because supervision, export control, procurement leverage, compute regulation, and emergency recall authority are enough.
Anthropic may be technically right and strategically doomed on the argument.
Perfect jailbreak resistance is impossible. Narrow jailbreaks exist everywhere. Their process complaint is legitimate. But national security does not care about clean process once the perceived downside is adversary uplift from a frontier system.
This is the first visible recall-risk event for frontier AI.
That is the real phase change.
AI labs are no longer just companies shipping models. They are strategic cognition operators under sovereign tolerance. The public still sees apps. The state sees capability transfer. The state frame wins.
Fable was probably too capable, too global, too fast, and too imperfectly controllable for the government’s comfort. Anthropic tried to defend it as a commercial product with safeguards. The government treated it like a dual-use system with insufficient national absorption time.
That is the new regime.
Fable returns wounded.
Anthropic gets put on a shorter leash.
Other labs bend early.
Frontier AI becomes quietly licensed.
Public access to the strongest cognition narrows over time.
The open frontier was shorter than people thought.
SightBringer: ⚡️This is a monster signal.
This is the moment frontier AI stops being treated like software and starts being treated like controlled strategic capability.
The key phrase is not “customers.”
The key phrase is “foreign national Anthropic employees.”
That means the state is no

Some reads from the current Fable ban situation:
- Vagueposting that a model can hack everything has consequences if you then end up releasing anyway. Saying other models also can after the fact is not enough.
- Asking for regulation when you can't specify exactly what regulation has predictable consequences.
- The ratchet is clearly moving towards license raj
- There are many who want an implicit license raj (AISI testing with power to block) but it's the same thing in practice. It is bad. Bad for safety, since now there's no choice but to accelerate for others.
- There's no way to allow models to be used "at large" going forward if the govt treats models as weapons.
- This is *fantastic* for Chinese models.
- The govt is ofc overstepping but honestly if you didn't expect that then you're naive!
- Leopold's narrative is almost too on the nose.
- Safetyists have wanted "perfect safety" as a goal, which is unachievable, and I've said a thousand times before it will backfire. This is the backfire.
- This *still* assumes the old view that the individual model is the bad part and not a system, which will inevitably lead to bad governance.
- This will get reversed in a bit and the model will get released (license raj), but the precedent is set. And many will say "ah this was bad but at least we got a license raj". They will be wrong.
- Openai has more breathing room for a better model to be released. And they're toning down the rhetoric. This will help them.
- Competition is good.

Tyler Cowen on the Fable/Mythos event. The issue with point 5 is that we are probably less than a year away from powerful RSI. Once automated researchers reach parity, the USG 𝘤𝘢𝘯 nationalize the labs and run them effectively, without any of the people currently working there.
tylercowen: A few thoughts on the recent Mythos brouhaha: https://marginalrevolution.com/marginalrevolution/2026/06/sometimes-it-is-hard-to-solve-for-the-equilibrium.html

The end-game for Anthropic is becoming government controlled by a single nation. As Thiel once said: Going IPO is like a government takeover (quasi empowering CFO, lawyers, etc as govt actors). Regulatory capture for capability oversight is a step towards monopoly.

It’s naive to think anything is backfiring here. This is part of the expected plan for reg capture. Of course the govt steps in such that you design and define the rules you already follow but are now required by your rivals. For their AI could be too dangerous.
nicolas, 30 ans: I can’t believe Anthropic comparing their product to nuclear weapons 800 times backfired on them. I am shocked

“Give up the failed experiment of the last six years.”
UC faculty in the humanities, social sciences, and professional schools are supporting their STEM colleagues with a new letter calling for a return to standardized tests in admissions.

He doesn't have a CS degree, doesn't read code, and doesn't even look at AI's plans most of the time.
Yet @mvanhorn has built one of the most impressive open source track records I've seen.
My next episode is for every non-technical person who has doubts that they can build with AI agents.
📌 Subscribe to see how Matt does it tomorrow: https://www.youtube.com/@PeterYangYT?sub_confirmation=1

The cool thing about the open source harness tools like hermes, openclaw, gbrain, etc is that you totally avoid vendor lock in while still getting gains from advanced closed models.
Don’t be enslaved to any single provider, keep building up your personal AI stack.
GREG ISENBERG: The takeaway from Fable 5 being BANNED by the government: GET GOOD AT LOCAL MODELS SO YOU HAVE 100% CONTROL.
My entire weekend was going to be building my craziest ideas with Fable 5. That's now cancelled.
So instead of building with Fable this weekend, I've decided I'll go

Cette vidéo est un véritable cauchemar éveillé pour l'écologiste décroissant.
Un robot qui traque la nuit les pathogènes et les nuisibles à la lumière ultraviolette, sans un gramme de produit chimique, ce n'est pas un gadget... De quoi faire s'effondrer toute la théologie écologiste. Ici, c'est bien l'entrepreneur et le marché qui offrent une solution réellement efficace aux défis environnementaux.
Pas de contrainte, pas de retour en arrière et pas de renoncement. L'entrepreneur résout le problème en créant de l'abondance là où l'on nous promettait la pénurie. Le rôle du progrès a toujours été celui-là : produire de l'abondance à partir de la rareté naturelle avec comme moyen ultime l'ingéniosité humaine.
Reste alors une question : si la technologie résout réellement les problèmes que l'écologisme prétend combattre, pourquoi l'écologisme la déteste-t-il à ce point ?
Tout simplement parce que ce qu'il veut, ce n'est pas une nature préservée, c'est une société administrée, dont il serait aux manettes. Comme toutes les autres idéologies constructivistes, socialistes et collectivistes, ce qui importe vraiment à l'écologiste ce n'est pas de résoudre les défis de son temps, c'est de régner sur les hommes de son temps.
Le héros sera toujours l'entrepreneur, jamais celui qui le déteste.
Danny Bernstein: autonomous robot driving through the field at night. no chemicals. no pesticides. just UV light killing pathogens and pests while everyone sleeps. this is @tricrobotics.
this is what chemical-free pest control looks like at scale.

Yann LeCun (LeBased) weighs in on the
@AnthropicAI debacle. I have to say I agree with 100% with Yann here.
"One reaps what one sows." 👏

Jackie Fielder weaponized a dead cat then immediately pumped a crypto scam.
When a Waymo killed a neighborhood cat named KitKat in the Mission she rushed to hold press conferences and rallies demanding bans on self-driving cars. Critics called it cynical political theater since human drivers kill millions of animals every year.
Right after the rally she jumped on X and started hyping the $KITKAT memecoin on Solana. Watchdogs called it a classic PUMP-and-DUMP. She never disclosed if she held a stake or cashed out while retail investors got wrecked.
A formal ethics complaint was filed against her for using her public office to promote a speculative financial grift. This is the same “Democratic Socialist” who rails against corporate greed and chairs the committee that polices it.
While you struggled to pay rent she was pumping a crypto scam off a dead cat.
This is staggering hypocrisy and self-dealing. Jackie Fielder must resign.

We just announced our Fusion API:
- Fable-level performance on deep research tasks, at half the cost
- Better-than-SOTA performance using panels
The future of AI is neurodiversity, not single-model takeovers.
OpenRouter: Introducing the Fusion API, the smartest compound model in the market.
Fusion achieves Fable-level intelligence at half the price.
How it works 👇

The showing we got for Isaac 1 yesterday was everything we could've hoped for
Roboticists, engineers, designers, students, kids, grandparents all in one place
Seeing how home robots will change the way we live for the better
Weave Robotics: Isaac 1
Today, 4.30pm - 6.30pm
285 7th St, San Francisco