US Government Takes Control of AI Model Releases as Anthropic and OpenAI Face Regulatory Limbo

Reviewed byNidhi Govil

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The US government has begun implementing strict oversight over frontier AI models, pulling Anthropic's Mythos from the market and forcing OpenAI into limited preview for GPT 5.6. After weeks of uncertainty, Washington is now negotiating voluntary standards with major AI companies to formalize the review process, but the ad hoc approach has already created serious economic consequences for the US AI industry.

US Government Tightens Grip on Frontier AI Models

The US government has dramatically shifted its approach to AI regulation, moving from a hands-off stance to active intervention in how and when advanced AI models reach the market. Two weeks after pulling Anthropic's Fable and Mythos models from public access, the government is now requiring OpenAI to release its new GPT 5.6 model only through limited preview, with officials approving access "customer by customer" until general release can be authorized

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. While OpenAI CEO Sam Altman reportedly projected the preview period might last only "a couple of weeks," Mythos has already been offline for months with no clear path to general availability

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Source: The Hill

Source: The Hill

The Trump administration's June 12th export control order demanded that Anthropic suspend access by "any foreign national" to Mythos 5 and Fable 5 due to security concerns, covering any non-US citizen inside or outside the US, including Anthropic's own employees

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. After 14 days of high-intensity negotiations between Anthropic executives and Washington officials, no resolution has emerged, leaving the company's most powerful AI models in regulatory limbo.

The Economic Stakes for Anthropic and OpenAI

The financial implications are substantial for both companies. Before the government intervention, Anthropic was viewed as one of the rare AI companies with a clear path to profitability. Its Mythos-class models, whose input tokens sell for double the cost of its lower-powered Opus 4.8, were expected to boost revenue ahead of an upcoming IPO

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. The company needs this revenue to cover recent commitments, including a deal to pay SpaceX $15 billion per year for access to its data centers

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Source: Fortune

Source: Fortune

For OpenAI, even a few weeks spent in review could significantly limit the economic upside of a costly new system, at a time when AI labs are trying desperately to improve their bottom lines

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. If the pace of model development slows as a result, it's likely to dampen the ongoing data center buildout that has defined the industry's recent expansion.

Voluntary Standards Framework Takes Shape

In response to mounting pressure and confusion, the US government is now negotiating voluntary standards for new AI models with major companies including Google, Microsoft, Amazon, Anthropic and OpenAI

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. According to reports, an announcement could arrive within days, formalizing the review process sketched out in the June executive order

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The standards would set benchmarks and timelines for covered frontier models, while clarifying who gets access to them inside the US and abroad

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. The Center for AI Standards and Innovation (CAISI) under the Department of Commerce and the National Security Agency are expected to be central to these standards once formalized

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The Cybersecurity Trigger Behind Government Action

The catalyst for the Anthropic intervention appears to have been concerns about cybersecurity capabilities. The US Department of Commerce reportedly tested Fable 5 before release and raised no complaints initially. The agency apparently didn't act until someone—reportedly Amazon CEO Andy Jassy—flagged a method for seemingly breaking Fable 5's guardrails

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Katie Moussouris, founder and CEO of Luta Security, reviewed a report about the Fable 5 vulnerability at Anthropic's request and concluded it was significantly overblown. Researchers had jailbroken guardrails that prevent Fable 5 from finding exploitable security holes, but Moussouris argued this functionality is essential for AI coding and defensive security work

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AI Governance Challenges and Industry Unity

The fundamental problem facing AI regulation is that the US government lacks clear expertise or capacity for the kind of testing needed to evaluate advanced AI models. It's not even clear what regulators are trying to protect against, since there's been no effort to articulate what risks the government is actually concerned about

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Most companies making dual-use products can evaluate them using essentially a checklist during manufacturing. Anthropic, however, is facing a complicated bureaucracy figuring out how to apply its rules from first principles

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. This export control process can normally unfold over months, if not years, and conclude before a product reaches market.

Global Implications and Market Power Vacuum

The glacial negotiations have created a power vacuum in the global AI market, not only because of the Mythos shutdown, but because the US government has signaled a willingness to lock down American AI systems it deems risky

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. Countries have started calling for non-American AI alternatives. As cybersecurity expert Alex Stamos noted, this sort of "vibes-based regulation" could result in public loss of trust towards American AI companies, with the world receiving the message that services can and will be cut off at any moment by the White House

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Source: Axios

Source: Axios

The Cost of Ad Hoc Executive Interventions

Stanford fellow and author of 'The Tech Coup' argues that tech companies created this collective inaction problem by failing to speak out when core rule-of-law principles were attacked. The absence of a legitimate rule book doesn't mean the absence of power plays and ad hoc executive interventions—instead it means that interventions are political and unconstrained

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Transparency International's latest Corruption Perceptions Index gives the US 64 out of 100, its lowest score on record

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. The industry got the deregulated environment it asked for, but things are not playing out as hoped. Instead of predictable rules, companies face uncertainty that executives identified as their biggest economic concern in recent surveys.

What Comes Next for the US AI Industry

Critically, Anthropic and OpenAI now face identical challenges with the same potential disaster waiting if they fail. The cost of implementing a haphazard government approval process for every frontier model is obvious, and there's no fix that helps one lab without helping the others

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. Addressing biorisk, cybersecurity, and alignment concerns will require working together, trusting independent groups to guide the process, and lining up behind the least-bad regulatory options available instead of fighting every regulation.

Whether the voluntary standards framework actually reduces friction or simply codifies the ad hoc reviews already underway depends on details that haven't yet been made public

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. Companies retain the right to decline participation without penalty, which means the framework's force depends entirely on how many of the largest labs opt in. If the benchmarking process is classified as expected, the public won't know what standards Big AI is being held to

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