English | Chinese Original

English translation of the Chinese original. This version is generated for international readers and may be refined over time.

Date: 2026-06-13

Fable 5 is just three days away.

A few days ago, you were talking about whether it was the greatest model of Anthropic, whether it was strong or not in Claude Code, and how long it was going to be free to subscribe to it.

Turns out there's been a King's bombing today.

An hour ago, Anthropic announced that the United States Government, under its national security authority, had issued an export control directive calling for the suspension of visits by any foreign citizen to Fable 5 and Mythos 5.

**Note: Any foreign citizen. **

Whether you're in or out of the United States. Not even Anthropic's own expatriate employees can access it.

Other Claude models are not affected.

We used to talk about modeling, about price, context, running points, API, who wrote stronger codes.

Now talk about modeling, you have to add:** It's unregulated. **

If you're just web-end chatting, you probably cut to another model.

If you specify in API or Claude Codeclaude-fable-5That's a direct restriction.

And then, to apologize, the A Society reset it.

That's kind of a good move.

After all, this wave was suddenly banned. You just opened a Fable 5 session, got cut in half. Who's that?

What happened?

In an official statement, Anthropic stated that the Government letter did not give very specific reasons for national security.

It is their own understanding that the United States Government believes that it sees some way of bypassing the Fable 5 security mechanism, the so-called jailbreak.

But Anthropic doesn't quite agree with this judgment.

It said that it had seen the demonstration, which contained only a few known small holes, and that other open models could find similar problems. Anthropic also stressed that, to date, no test personnel had been able to find a general jailbreak that could be bypassed extensively.

And that's the thing:

"You said it was risky, I admit it. But you say this risk is so serious that you have to call it back at once. I don't think so."

Fable 5 is a Mythos-class model. It's the same bottom model as Mythos 5, except Fable 5 with a stricter security fence open to ordinary users.

Anthropic himself admits that it places severe restrictions on the direction of cyber, biochemistry, model distillation. Many times, Fable 5 will cut the request to Opus 4.8.

It was too sensitive to be told the last few days.

And that's the problem: Fable 5 is the most powerful and the most protective. It is perceived by ordinary users as too sensitive, and the Government feels it is not safe enough.

Neither side is satisfied.

What does the English mean?

More interestingly, someone sent a screenshot.

This paragraph in English probably means:

The Government shall have the power to prevent or halt the deployment of the model if it is determined, on the basis of a third party assessment, that there is an unacceptable risk. This power must, however, be limited to the above four specific risks and must be protected against political bias or arbitrary decision-making.

This is so interesting.

Dario says that if there is a risk in the model, the government has the power to stop it, and then the government bans the A Society's Fable 5.

Dario, this swinging dart hurts.

---

This time Fable 5 is banned, a clear signal.

** The issuance of the front-line model will be accompanied by product and policy attributes. **

Previously, the models were offline, often because of cost, limit flow, bug, product strategy.

One more reason: the Government considers it to be a security risk.

This has a significant impact on developers.

You imagine a scene where you're changing the code with table five, and then suddenly a ban, model, you can't even use it.

Do you use any other models, your code just crashes?

So this sudden one-size-fits-all ban is irresponsible to all developers.

I've seen from this piece, claude.ai can't use table 5 model anymore.

It was so sudden.

But I don't think it's the last time.