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Anthropic Fails to Lift US Export Curbs on Fable 5, Mythos 5 After DC Talks

aiai-governanceai-policy-regulationai-legal-safety 237 posts · 102 accounts

Anthropic said senior leaders met Trump administration officials on June 15 but failed to win relief from export controls on Claude Fable 5 and Mythos 5, leaving the company’s most advanced AI models offline. The curbs, which require Anthropic to suspend access by foreign nationals, remained in force after the Washington talks, though the company said both sides are working to resolve the dispute quickly.

White House AI adviser David Sacks has said Anthropic was asked to fix or de-deploy Fable after a guardrail jailbreak that officials believed could expose Mythos’s more powerful cyber capabilities. Anthropic says the identified technique surfaced only minor vulnerabilities that other public models can also find. The Washington Post reported officials had weighed export controls weeks earlier after a dispute over Mythos access for a China-linked firm, adding to concern among US allies over dependence on American frontier AI systems.

From the sources (25 posts)

@shayan86

RT @AnthropicAI: The US government, citing national security authorities, has issued an export control directive to suspend all access to F…

@kimmonismus

It was in fact Amazon (CEO Andy Jassy) who reportedly helped trigger the Claude shutdown. Via The Information Amazon CEO Andy Jassy reportedly warned senior Trump administration officials about security risks in Anthropic’s newest Claude m

@firstadopter

Did anyone in U.S. government do any ramifications analysis and realize this move, where U.S. can shut down models on a whim, will incentivize all foreign countries/companies away from building on top of American models pushing them to use

@levie

This whole Fable export control situation is actually net positive to regulation discourse. It’s an early peek into what AI regulation would end up looking like at scale when enacted at the model layer instead of the specific application of

@sriramk

On everyone asking about the events of the last 24 hours 👇

@chooserich

Everybody thinks Anthropic messed up here… Am I the only person that thinks there is no better marketing possible?! They have a product so good, the US government made it illegal

@steph_palazzolo

Breaking: Amazon CEO Andy Jassy was among the tech leaders who raised concerns to senior Trump officials this week re: security risks in Anthropic's newest models. Those convos set in motion the government's new export controls on foreign

@andrewcurran_

Conversations between Amazon CEO Andy Jassy and Treasury Secretary Scott Bessent led to the decision by the White House last night to control the use of Fable 5 and Mythos 5, which resulted in Anthropic's subsequent decision to remove them

@kimmonismus

Interesting: According to David Sacks’ opinion, the fault lies with Anthropic (specifically CEO Dario Amodei). He argues that: • Anthropic released Fable (Mythos with guardrails) but refused the U.S. government’s reasonable request to fix

@zephyr_z9

U.S. governent's national security apparatus is hardened", which "could happen in a few weeks". Very very interesting

@yuchenj_uw

Anthropic called Mythos dangerous in its own safety statement. That statement is now the reason Fable 5 got banned by the US gov. Surprisingly, “Dario refused.”

@barrysilbert

RT @coingecko: INSIGHT: $TAO surged 17.2%, partly driven by growing demand for decentralized AI alternatives following the suspension of Cl…

@zephyr_z9

"legally independent European operating entity with its own operational control, or through licensing the model weights to a European operator under European governance." USG will never allow this to happen. They have the toolkit to stop t

@deredleritt3r

Update: - The company that reported to Anthropic to the U.S. government was Amazon, one of Anthropic's key partners and a key investor in the company. Amazon's CEO, Andy Jassy, was personally involved. - The Information reports that Jass

@cryptorover

RT @cryptogoos: BITTENSOR RALLIES ON AI POLICY SHIFT Bittensor $TAO jumped 17% as the U.S. moves to suspend foreign access to Anthropic’s…

@cryptorover

CRAZY: THE US GOVERNMENT'S BAN ON CLAUDE MYTHOS 5 IS PUMPING THIS AI ALTCOIN. Bittensor $TAO just jumped 26%. The US government issued an export control directive forcing Anthropic to disable its most powerful models, Fable 5 and Mythos 5

@guibibeau

Happy in those moments i have my RTX 6000 rig runnign local AI. Obviously Fable destroys it but it's good enough to wait until a green card...

@zephyr_z9

RT @citrini: The risk of the government deciding that a model is too dangerous should only add to the reasons why open source models runnin…

@firstadopter

Yann agrees!

@cryptorover

BOOM: 🚀 bittensor:native jumps 13%+ as the U.S. moves to suspend foreign access to Anthropic’s Fable 5 and Mythos 5.

@johnkonrad

Intellectually, I know I should care about this. America should recruit the best minds on Earth and put them on the hardest problems. If true, this is potentially devastating news. Emotionally? After watching so many iconic American comp

@zephyr_z9

Restricting their customer base Slowing down model releases (by at least 3-6 months) Models that cross a certain intelligence threshold are now a supply chain risk for non US enterprises and foreign subsidiaries of US enterprises Doesn't lo

@firstadopter

RT @firstadopter: If you keep comparing your product to "missile silos" and nuclear weapons ... you're never gonna believe what happens nex…

@zephyr_z9

RT @BenBajarin: The Anthropic news is timely for the confidential AI report we published Thursday, noting the need for the secured and veri…

@zephyr_z9

WELP....

Preview built on a synthetic news corpus (16 weeks, Apr–Jul 2026). Impact calls are model reads, not price data.

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