U.S. Lifts Export Ban on Anthropic AI Models — What It Means for Amazon and Broadcom Stocks

TLDR

• The U.S. government has lifted its export ban on Anthropic’s Fable 5 and Mythos 5 AI models, which were suspended on June 12 over cybersecurity concerns.
• Anthropic agreed to proactively detect security risks and alert the government to any malicious activity going forward.
• Amazon and Broadcom, key infrastructure partners, stand to benefit from the restored access.
• The models were pulled after researchers found a potential “jailbreak” workaround that could allow misuse for cyberattacks.
• Both Anthropic and OpenAI are expected to launch IPOs valued at over $1 trillion in the coming months.

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The U.S. Department of Commerce has lifted its export ban on Anthropic’s two most advanced AI models, Fable 5 and Mythos 5, nearly three weeks after ordering their suspension over national security concerns.

Claude Fable 5 will be available again globally tomorrow.

After a series of productive conversations with the US government, we’re redeploying the model with a new set of classifiers to target and block more cybersecurity tasks. In the near term, some routine tasks like coding…

— Anthropic (@AnthropicAI) July 1, 2026

Anthropic said it will begin restoring access to both models on Wednesday after being notified that restrictions had been lifted.

Why the Models Were Suspended

The two models were abruptly pulled on June 12 after the U.S. government raised concerns they could be used to exploit weaknesses in computer systems.

Researchers had found a potential “jailbreak” — a method of bypassing the models’ built-in safety restrictions.

Anthropic pushed back at the time, saying the government had not identified specific concerns and that a “narrow potential jailbreak” was not enough reason to pull a product used by hundreds of millions of people.

Fable 5 is a consumer-facing model built for deep reasoning and independent task completion. Mythos 5 is designed for businesses and cybersecurity professionals, with the ability to identify and exploit vulnerabilities in computer code.

What Anthropic Agreed To

Commerce Secretary Howard Lutnick wrote to Anthropic confirming the restrictions had been lifted.

In the letter, he said Anthropic has agreed to proactively detect and address security risks and to alert the government of any malicious activity.

The company has also agreed to collaborate with the government on future model releases. The Commerce Department said it reserves the right to reinstate restrictions if needed.

Anthropic said its safety systems, while not individually perfect, work together to make the models very difficult to misuse.

Amazon and Broadcom in Focus

Amazon and Broadcom are the two biggest infrastructure partners for Anthropic’s AI models.

Amazon has already invested $13 billion in Anthropic and committed to invest up to $20 billion more. Anthropic has agreed to spend more than $100 billion over ten years on Amazon Web Services.

Broadcom announced a deal earlier this year to supply Anthropic with 3.5 gigawatts of computing capacity through Google’s AI processors, starting in 2027.

Amazon.com, Inc., AMZN

In early trading on Wednesday, Amazon shares were roughly flat while Broadcom was down around 1.9%.

The extended pause had raised concerns that Anthropic could lose ground to rivals. OpenAI said its GPT-5.6 models would initially be available to a small group of approved customers, with broader access expected in the coming weeks.

Both Anthropic and OpenAI are expected to go public with valuations exceeding $1 trillion later this year.