🍭 Washington Killed Fable In 3 Days 🚨

Good morning. Somewhere an enterprise architect is explaining to their CISO that the model they deployed Monday got pulled by the government on Friday.

Over a verbal tip. About reading code.

Let’s dive in 👇

🍭 What’s Cookin’:

• Anthropic got its flagship model killed by Washington in 72 hours

• OpenAI bought a German startup so Codex can work while you sleep

• Fable 5 system prompt leaks on GitHub

Anthropic
🚨 Washington Killed Fable In 3 Days

The Bite:

Anthropic received a US government export control directive on June 12 ordering it to disable Claude Fable 5 and Claude Mythos 5 for all users worldwide.

The order technically targeted foreign access, but Anthropic had no way to segment foreign nationals from US persons in real time across hundreds of millions of users.

So both models went dark for everyone.

Fable 5 had launched three days earlier, on June 9, as the first publicly available model in Anthropic's Mythos class.

The government cited a claimed jailbreak, but provided only verbal evidence and no written technical detail.

Anthropic says the technique amounts to asking the model to read a codebase and fix software flaws, a capability available in other public models including GPT-5.5.

Snacks:

• Fable 5 launched June 9 with hard safety fallbacks to Opus 4.8 on cybersecurity, biology, and chemistry queries

• Anthropic ran thousands of hours of external red-teaming before launch and found no universal jailbreak

• The directive arrived with zero written technical detail

• IBM X-Force's Valentina Palmiotti told TechCrunch that Fable rejected "any request that could be tangentially cyber related"

• Anthropic's own launch blog acknowledged that perfect jailbreak resistance "is not currently possible for any model provider"

• Researcher Pliny the Liberator published Fable 5's full 120,000-character system prompt on GitHub within days of launch

Why it Bites:

Anthropic spent months telling the world exactly how dangerous Mythos was:

• The system card flagged autonomous vulnerability discovery;

• Glasswing was restricted to vetted partners.

The language was careful and deliberate: this model requires special handling.

And Washington took the pitch at face value.

The company built the loudest case for government oversight of any lab:

• It lobbied for statutory review processes;

• It published a framework calling for the ability to pause frontier development.

And the first time that authority showed up, it was pointed at them, with none of the transparency or process they'd asked for.

The claimed jailbreak was asking the model to read code and fix bugs.
That’s what every security engineer does before lunch.

So the capability isn't the story.

The story is that Anthropic sold the danger so convincingly that the government bought it, then applied a standard Anthropic itself says would halt every frontier deployment in the industry.

For every enterprise that wired Fable 5 into production on Monday and lost it by Friday, the lesson is shorter.

Availability you don't control is a dependency you can't trust.

And now, after this trust crisis, the question that remains is:

How will this affect Anthropic’s IPO?

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🧠 You Need to Know

🔧 Fable 5 System Prompt Leaked On GitHub Within Days Of Launch
→ Security researcher Pliny the Liberator published the model's full 120,000-character system prompt and claimed to bypass its safety classifiers using a multi-agent "pack hunt" technique before the government shutdown order hit.

🚨 US Government Forces Anthropic's Fable 5 And Mythos 5 Offline
→ An export control directive received at 5:21 PM ET on June 12 ordered Anthropic to disable both models for all customers worldwide over a claimed jailbreak, three days after Fable 5's public launch.

⚙️ OpenAI Acquires Ona To Power Long-Running Codex Agents
→ The German startup formerly known as Gitpod brings secure cloud execution infrastructure into Codex, which now has over 5 million weekly users.

🤖 EngineAI Files Confidential Hong Kong IPO
→ The Shenzhen humanoid robot maker is working with CICC and Citic Securities on the listing, two years after founding and one month after a $200M Series B at $1.5B valuation.

📱 Huawei Unveils HarmonyOS 7 With Agent-First Architecture
→ The HDC 2026 release transforms Huawei's Xiaoyi assistant into a system-level AI agent with over 2,100 system capabilities, shifting the OS from app-centric to intent-driven interaction.