Stamos Leads Cybersecurity Letter Urging Trump on Anthropic Ban
More than one hundred cybersecurity executives and researchers, including leaders from Adobe and Nvidia, sent a letter to the Trump administration on Sunday, June 14, 2026 urging the government to lift the Commerce Department export controls that pulled Anthropic's Fable 5 and Mythos 5 models from public access on Friday, June 12, the Associated Press reported through WRAL. The letter was led by Alex Stamos, the former Facebook chief security officer and current head of Krebs Stamos Group.
The signatories asked the administration to lift the export-control directive and committed to a longer-cycle policy framework for AI risk assessments. The letter's core demand was framed in collaborative-policy language:
open, scientific and transparent process of handling AI risk assessments in the future
The Stamos-led group argued that while the Anthropic Mythos models are quite good at identifying software flaws and weaponizing exploits, they are not uniquely good at those tasks. Many other foundation and open-source models serve similar security-audit purposes across the broader commercial AI market.
The Adobe and Nvidia executives' inclusion on the signatory list is the structural element that places the letter at the head of the post-export-controls policy response. Adobe's recent fifteen-percent year-over-year increase in AI-related ARR and Nvidia's position as the central GPU supplier to the broader US frontier-model cluster place both companies at the center of the commercial-AI-policy conversation.
Alex Stamos's leadership of the letter places one of the most visible cybersecurity-policy voices of the post-2018 cycle at the head of the cybersecurity-community pushback. Stamos's track record on cross-industry policy advocacy, which includes the Stanford Internet Observatory founding work and the post-Facebook consulting practice at Krebs Stamos Group, makes him an effective coordinator for the kind of broad-coalition letter the signatories produced.
The Anthropic side of the letter response sits inside the continuing Washington meetings that the company's senior technical staff have been running across the weekend and the early week. The company said it had received only verbal notice of a potential narrow non-universal jailbreak from the administration before the Friday export-controls order landed, and disagreed that the issue warranted a model recall.
The Friday Commerce Department export-controls order, which the David Sacks social-media-post accusation cycle from Saturday June 13 had been positioning as the consequence of an Anthropic refusal to fix a Fable 5 jailbreak, is the operative legal mechanism the signatories are asking the administration to reverse. The export controls bar Anthropic from distributing the Fable 5 and Mythos 5 models to foreign nationals.
The cybersecurity-community argument the letter develops sits inside the broader debate about whether export controls on frontier-AI models advance or harm the United States cybersecurity posture. The Stamos-led signatories argue that removing the best commercial-AI cybersecurity-defense capabilities from the US security community is dangerous when adversary states are rapidly advancing their own frontier-AI capabilities.
The administration's response to the letter has not yet been formally signaled, but the David Sacks Saturday social-media position and the Treasury Secretary Scott Bessent earlier-in-the-week framing suggest the administration is split on whether to maintain the export-controls posture or modify it. The Commerce Department has not made any post-letter statement.
The broader commercial-AI-market implications of the dispute fold into the question of whether OpenAI's, Google DeepMind's, and the other frontier-model laboratories' next-generation releases will face similar export-controls treatment. The Stamos-letter framework, if accepted by the administration, would establish a more collaborative review process rather than a Friday-evening export-controls reflex.
What sits ahead is the Anthropic Washington meetings closing-out, the administration's formal response to the Sunday letter, and the broader question of whether the Fable 5 and Mythos 5 models return to commercial circulation in some modified configuration. The cybersecurity community's pushback positions the dispute as the most visible commercial-AI policy fight of the post-January-2025 administration cycle.
