News linked to both this project and an event.
Anthropic will meet with Trump administration officials today regarding the "Mythos" model. (Jin Shi)
the U.S. government's export controls and access restrictions on Anthropic's models, Fable 5 / Mythos 5, were partly driven by Amazon's cybersecurity research and AWS CEO Andy Jassy's communications with the White House.It is understood that research submitted by Amazon indicated that through a series of prompt tests, researchers could induce Fable 5 to output sensitive information potentially usable for cyberattacks, raising security concerns. Subsequently, Andy Jassy reported these findings to the U.S. government level, prompting the White House to implement further restrictions, including banning foreign users from accessing the model.Meanwhile, former U.S. Commerce Department official Kate Koren revealed that the White House's existing policy stance towards Anthropic may have also influenced this decision. This is because Anthropic has disagreements with the White House over the boundaries of AI safety, including refusing to use its models for mass surveillance or lethal autonomous weapons systems. Although the two sides had eased tensions and expanded cooperation earlier this year, this incident could reignite strained relations between them. (The Wall Street Journal)
David Sacks, co-chair of the President's Council of Advisors on Science and Technology, responded to the regulatory implications of the Anthropic “security controversy,” stating that he has communicated with multiple parties regarding the current situation at Anthropic. He concluded that the core of the event lies in the security controversy sparked by its newly released model “Fable” (the commercial version of the Mythos-class models). Although Anthropic publicly stated the vulnerability was “not severe,” the U.S. government and testers disagreed with this assessment, believing it was significant enough to impact the model's security, even involving “cyber weapons operability” risks.David Sacks further criticized that Anthropic has long emphasized “safety first,” yet in this instance, it was more inclined to keep the consumer version continuously online rather than prioritizing the repair of the security issue. He stated this matter should not be conflated with previous defense or regulatory controversies and noted that the U.S. government still recognizes Anthropic's technical capabilities. The current problem “could have been resolved quickly, the ball is in Anthropic's court.”
Odaily Zcash founder Zooko Wilcox posted on X stating that a security audit conducted by Anthropic's Claude Mythos AI model did not find any "more severe vulnerabilities" in the Zcash protocol. The audit was commissioned by Shielded Labs, a Swiss non-profit organization supporting Zcash development. On June 3, Zcash developers temporarily paused Orchard transactions after discovering a vulnerability in the shielded pool, restoring functionality through an emergency upgrade the same day. The issue stemmed from a four-year-old forging vulnerability in the Orchard shielded pool, identified by security researcher Taylor Hornby with the assistance of Anthropic's Claude Opus 4.8 model. The Zcash Foundation stated there is no evidence that the vulnerability was exploited, nor was any unauthorized value creation detected, and user privacy remained unaffected.Anthropic released the first public version of the Claude Mythos model, Fable 5, on Tuesday, and stated on Friday that it has suspended access to the Fable 5 and Mythos 5 AI models due to export control directives issued by the U.S. government citing national security concerns. (Cointelegraph)
a16z co-founder Marc Andreessen published a highly satirical long-form post on platform X, centered around the topic of "AI regulation." Through two extreme narratives, he presented the conflicting positions on this issue.In the narrative "against AI regulation," Marc Andreessen portrays regulation as a force that stifles innovation, potentially killing garage startups, weakening the Silicon Valley ecosystem, increasing compliance burdens, and limiting the development of AI and computing infrastructure. He sarcastically notes, "If US AI regulators had policed our grandfathers, they would have banned the use of horse-drawn carriages."In the narrative "supporting AI regulation," Marc Andreessen uses irony to describe the order, safety, and expansion of the industrialized compliance system that regulation could bring. This includes a massive compliance industry, strengthened government regulatory frameworks, and social redistribution mechanisms.However, Andreessen does not offer a single conclusion in the article. Instead, through highly exaggerated language, he highlights the long-term structural conflict and rift within AI regulation between "innovation freedom" and "safety governance."In previous news, Anthropic issued a statement saying that the US government issued an export control directive under the guise of national security authority, requiring the suspension of all foreign entities' access to AI models Fable 5 and Mythos 5, regardless of whether the personnel are within the United States, including Anthropic employees who are foreign nationals.
the U.S. government has issued an export control directive citing national security authority, requiring the suspension of all access for foreign nationals to Fable 5 and Mythos 5, including Anthropic’s foreign national employees. To ensure compliance, Anthropic must close all customer access to Fable 5 and Mythos 5, while all other Anthropic models remain unaffected.The U.S. government provided oral evidence indicating a potential narrow-scope, non-general jailbreak method for the model. Anthropic is complying with the government's legal directive and removing all user access to Fable 5 and Mythos 5, but disagrees with the decision to withdraw deployed commercial models based on the discovery of a narrow-scope potential jailbreak, and is working diligently to restore access as soon as possible.
Anthropic CEO Dario Amodei has stated that if new AI models pose specific risks, governments should have the authority to prevent their deployment. In a lengthy post on Wednesday, Amodei argued that AI models should undergo mandatory third-party testing to assess potential risks across multiple domains. He wrote that if an AI is deemed to pose "unacceptable risks," then "governments should have the power to block or constrain its deployment." This is one of Amodei's strongest statements to date advocating for stricter AI regulation. "I believe that, at least during this current exponential growth phase, the most appropriate analogy is cars, airplanes, or pharmaceuticals—technologies that are essential to the modern economy but can also lead to significant loss of life if poorly designed or misused," Amodei wrote. Anthropic has previously warned that its AI model, Mythos, possesses the ability to discover and exploit critical software vulnerabilities, leading the company to restrict access to a small number of partners. This week, Anthropic also released a new version that removes related cybersecurity attack capabilities. (Jinshi)
According to The Information, sources say Anthropic may release its new model Claude Fable today. Described as a secure version of Mythos, Claude Fable retains some advanced capabilities while adding safety restrictions for high-risk scenarios such as cyberattacks. Anthropic previewed Mythos in April this year, stating that it can discover numerous previously unknown cybersecurity vulnerabilities—but did not directly release it due to potential safety risks. As of now, Anthropic has not officially announced detailed information about Claude Fable.
Odaily Seer monitoring shows that on Polymarket, the probability of "Claude Mythos model release date being June 10" is currently at 74%, up 24% in 24 hours. Additionally, the probability for "Release before June 12" stands at 83%; "Release before June 15" at 89%; "Release before June 22" at 95%; "Release before June 30" at 94%; and "Release before July 31" at 99%.Previously reported, tech journalist Alex Heath revealed that Anthropic will release a "public version of Mythos" tomorrow. The company plans to rename and slightly adjust Mythos, releasing it under the name "Fable 5."Odaily Seer continuously monitors the prediction market, seeing changes before pricing occurs.
Odaily reports: Artificial intelligence company Anthropic has agreed to provide a special briefing to relevant officials of the Financial Stability Board (FSB) regarding its Mythos AI model. The briefing will focus on security vulnerabilities identified by the model within the defense systems of the global financial network.According to two sources familiar with the matter, the communication was proposed by Bank of England Governor Andrew Bailey, requesting that Anthropic brief the FSB on its new preview version of the Claude·Mythos AI model. The FSB is currently compiling a report on compliance standards for the application of artificial intelligence in the financial industry, with a draft expected to be released next month for public consultation. Both the FSB and Anthropic have declined to comment on their recent communications. (Jiemian)
Odaily AI security startup Depthfirst has announced that its self-developed AI model outperforms Anthropic’s latest model, Mythos, in code vulnerability detection. It has discovered more critical security vulnerabilities at approximately one-tenth the cost, drawing attention from the cybersecurity industry.According to the company, a month before the launch of Mythos, it had previously claimed to have found a large number of severe vulnerabilities in key internet infrastructure code. Depthfirst now says its model has further identified multiple high-risk vulnerabilities that Mythos missed, all at a lower cost (approximately $1,000 compared to $10,000).Depthfirst CEO Qasim Mithani stated that the company has improved vulnerability detection efficiency through a “single-task-optimized AI model,” significantly reducing the cost of security analysis while enhancing coverage depth.The company completed $80 million in funding in March this year, achieving a valuation of $580 million. Alongside this, it launched the “Open Defense Initiative,” providing $5 million worth of AI detection credits to open-source developers and critical infrastructure projects for vulnerability scanning and security audits. (Forbes)
the White House has recently opposed Anthropic's proposal to expand the use of its AI model, Mythos, to approximately 120 companies, primarily based on security and computing power concerns. Anthropic had originally planned to add 70 new companies to the roughly 50 enterprises currently using Mythos, but the White House has raised doubts, worrying that insufficient computing power might affect the government's own usage of Mythos.Launched in early April, Mythos is designed to detect and exploit critical software vulnerabilities. It is currently limited to testing by enterprises managing key infrastructure, with no plans for public release. The White House fears that expanding usage to more commercial users could create a computing power bottleneck for the government when using the model. This is particularly concerning given Anthropic's computing power procurement agreements with Amazon, Google, and Broadcom—though contracts have been signed, new capacity has not yet come online.On the political front, relations between the White House and Anthropic have not eased. The Trump administration has publicly criticized Anthropic for hiring multiple former officials from the Biden administration and expressed dissatisfaction with its ties to liberal organizations. One example highlights the trust issues between the two sides: Collin Burns, a former researcher at Anthropic who was originally assigned to a government AI model evaluation role, was replaced by senior White House officials upon learning of his background, to avoid having AI company personnel directly involved in matters concerning dealings with other AI companies.Additionally, last week Anthropic disclosed an unauthorized access incident involving the Mythos model, further intensifying external regulatory scrutiny on the company.
, Anthropic and OpenAI have experienced security incidents in succession, drawing market attention to the security of AI models themselves. Currently, Anthropic is investigating a possible case of unauthorized user access to its Claude Mythos model. Almost simultaneously, OpenAI was also reported to have accidentally opened access to several unreleased models within its Codex application.Analysts believe that such incidents highlight that even AI model providers focused on cybersecurity capabilities still face significant security challenges. While AI is increasingly used for cyber defense, platform security and access control are becoming critical risk points.Industry insiders point out that these vulnerability incidents have intensified scrutiny over the security governance capabilities of AI companies, and also reflect that the security systems of current AI technology still need improvement amid rapid development. (The Information)
According to Decrypt, Mozilla recently revealed that Anthropic’s latest AI model, Claude Mythos, identified 271 security vulnerabilities during internal testing of the Firefox browser; all related vulnerabilities were patched this week. For comparison, a previous Anthropic model had detected only 22 security-sensitive vulnerabilities. Mozilla stated that all discovered vulnerabilities fell within the scope of what top human researchers could identify. Claude Mythos was officially launched in March 2026 and is Anthropic’s most powerful model to date for reasoning, coding, and cybersecurity. It is currently available exclusively to vetted partners—including Amazon, Apple, and Microsoft—under Anthropic’s “Project Glasswing” initiative.
Odaily News Anthropic has decided to restrict the public release of its Mythos model due to its highly automated cyber attack capabilities. Reports indicate that during internal testing, the model was already capable of independently completing vulnerability discovery and exploitation processes, and generating multi-step attack plans.Informed sources stated that in early testing, Mythos could autonomously build intrusion tools targeting Linux systems and, with guidance, execute complex vulnerability chain attacks. These capabilities were assessed as potentially posing risks to global infrastructure.Anthropic's management ultimately positioned Mythos as a cyber defense tool and opened it for testing to select institutions in a restricted manner. Industry insiders pointed out that similar models could significantly enhance the efficiency of cyber offense and defense, while also potentially introducing new security challenges. (Bloomberg)