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It is rumored that Anthropic has completed training on the new Mythos model, and Sonnet 5 may be released this week
according to AI observer Andrew Curran, Anthropic has completed training on a new, more powerful Mythos model. However, it is currently unclear whether the model will be named Mythos 5.1 or Mythos 6, and it is also possible that it is intended solely for internal research to accelerate subsequent model development.Additionally, with the appearance of the "claude-sonnet-5" model identifier on Anthropic's partner service platform, the developer community widely speculates that Claude Sonnet 5 might be officially released this week.
Mythos
Viewpoint: Mythos’ breach of the NSA signals that AGI is drawing near; 9% inflation will not become the norm
Anthony Pompliano, Chairman of Bitcoin treasury company ProCap Financial, posted on X stating that Mythos allegedly breached the U.S. National Security Agency’s (NSA) classified systems within hours—a development that will further intensify public concerns about AI risks and prompt increased regulatory intervention. Yet the more critical signal conveyed by this incident is that AGI (Artificial General Intelligence) is, in fact, drawing near. Current AI technologies not only surpass humans in capability but are also self-training and improving at an incomprehensible pace—“humans cannot compete with these models.”
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Polymarket probability drops to 41% that "Claude Fable 5 will be restored for US customers by June 26," down 16% in 24 hours
Odaily Seer Channel monitoring shows that the probability on Polymarket for "Claude Fable 5 will be restored for US customers by June 26" has dropped to 41%, down 16% in 24 hours.Due to US government export controls imposed on national security grounds, Anthropic suspended global access to the Claude Fable 5 model just days after its release on June 9.Latest reports indicate that Anthropic executives have submitted a proposal to US Commerce Secretary Howard Lutnick, pledging closer collaboration with the White House and working to address the security concerns that led to restrictions on its powerful "Mythos" and "Fable" models.Sources familiar with the matter say that during ongoing remediation negotiations, Anthropic has committed to resolving any security issues more quickly in the future, though there is currently no exact timeline for a complete resolution. Another insider stated that Anthropic co-founder and Chief Computing Officer Tom Brown, along with Head of Public Policy Sarah Heck, are leading negotiations with Trump administration officials. Representatives from both Anthropic and the Department of Commerce did not respond to requests for comment.Odaily Seer Channel continues to monitor prediction markets, seeing changes before they are priced in.
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Bloomberg: U.S. Government Ban Appears Ineffective—Early Users of Anthropic’s Mythos Still Have Access
According to Bloomberg, Anthropic’s early-selected group of enterprises can continue accessing the preview version of its AI model “Mythos,” despite a prior U.S. government directive requiring its full shutdown. Sources familiar with the matter say multiple institutions—including banks and technology companies—are using Mythos Preview through a testing program codenamed “Project Glasswing.”
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Polymarket probability of "Claude Fable 5 restored for US customers before July 1" rises to 73%, up 33% in 24H
Monitoring by Odaily Seer Prophet Channel shows that the probability of "Claude Fable 5 restored for US customers before July 1" on Polymarket has risen to 73%, up 33% in 24H.If Anthropic reopens Claude Fable 5 (or Claude Mythos, or a version confirmed to be the same model) to the US public before the specified date, this event will settle as "Yes"; otherwise, it will settle as "No". Qualifying methods of restoration include public beta or public waitlist; closed testing and private access do not count. Other models such as Haiku, Sonnet, and Opus are not included by default unless they are confirmed to be the same model as Claude Fable 5. Settlement will primarily be based on official announcements from Anthropic, supplemented by consensus reports from mainstream media.Due to export controls imposed by the US government on national security grounds, Anthropic urgently suspended global access to the Claude Fable 5 model just days after its release on June 9. Although the restrictions were primarily aimed at foreign users, due to the difficulty of real-time user identity screening, Anthropic ultimately closed access for all users, including those in the US, and switched requests to less capable models such as Opus 4.8. Anthropic is currently engaged in high-level discussions with the White House on issues including model capabilities and potential jailbreak risks. The company has publicly stated that the ban may have stemmed from a misunderstanding and is actively pushing to restore access.Odaily Seer Prophet Channel continues to monitor the prediction market, seeing changes before they are priced in.
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Anthropic employees concerned White House model ban may affect IPO plans
after the White House issued an emergency takedown order for the Fable 5 and Mythos 5 models, it sparked concerns among Anthropic employees regarding the company's IPO plans. According to reports, management faced pressure to respond after receiving a 90-minute limited-time takedown order, and some employees were confused by the shifting rationale for the takedown between "national security" and "security vulnerabilities," while also worrying that related regulatory pressure could affect the company's listing process. (New York Times)
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Grayscale: Anthropic Access Suspension Highlights Need for Decentralized AI
Odaily Odaily报道，The U.S. government ordered Anthropic to suspend access to its latest AI model for foreign nationals due to national security concerns, following which Anthropic disabled access to Fable 5 and Mythos 5 for all users. Grayscale Head of Research Zach Pandl noted that this move exposes the risks of centralized control over frontier AI technologies and will drive market demand for decentralized alternatives.Within 12 hours of Anthropic cutting off access, the Bittensor token TAO rose 30%, reaching $283 on Monday, a nearly three-week high. Pandl expects that as investors seek alternatives to centralized AI, demand for decentralized AI platforms like Bittensor will continue to rise. (cointelegraph)
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Anthropic will meet with Trump administration officials today regarding the "Mythos" model
Anthropic will meet with Trump administration officials today regarding the "Mythos" model. (Jin Shi)
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Cybersecurity Leaders Jointly Call for Lifting Restrictions on Anthropic’s Mythos Model
According to Cointelegraph, cybersecurity leaders led by former Facebook Chief Security Officer Alex Stamos jointly penned a letter urging the Trump administration to lift restrictions on the use of Anthropic’s Mythos model. They argue that these restrictions harm defenders far more than attackers, hindering the overall development of the cybersecurity ecosystem.
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Anthropic Model Safety Controversy Escalates, Amazon Accused of Being the "Hidden Force" Triggering Regulatory Intervention
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)
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David Sacks responds to Anthropic “security controversy” triggering regulation: Core conflict is unpatched vulnerability
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.”
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Zcash Founder Says Claude Mythos Audit Found No Critical Vulnerabilities
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)
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Anthropic Mythos AI Audit of Zcash Finds No New Critical Vulnerabilities
According to Cointelegraph, Zcash founder Zooko Wilcox stated that a security audit of the Zcash protocol—commissioned by Shielded Labs and conducted using Anthropic’s Mythos AI model—did not uncover any new critical vulnerabilities. Previously, security researcher Taylor Hornby discovered, using Claude Opus 4.8, a four-year-old forgery vulnerability in the Orchard shielded pool, prompting developers to urgently suspend Orchard transactions on June 3 and complete the fix the same day. The Zcash Foundation confirmed there is no evidence the vulnerability was ever exploited, and user privacy remained unaffected.
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a16z co-founder's lengthy response to US AI regulation: The dual extreme narratives between "maximum innovation freedom" and "maximum regulatory order"
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.
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Zcash Founder: Mythos Completes Zcash Security Audit, No Critical Vulnerabilities Found
Zcash founder Zooko posted on X, stating that at the request of Shielded Labs, Anthropic and Mythos conducted a security audit of Zcash, and no further critical vulnerabilities were found in the Zcash protocol. Shielded Labs and other parties are continuing to carry out security reinforcement efforts.
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Zcash Founder: Anthropic Assisted in Completing Zcash Security Audit, No Critical Vulnerabilities Found
According to a post by Zcash co-founder Zooko (@zooko), Anthropic, in collaboration with Mythos, conducted a security audit of the Zcash protocol at the request of Shielded Labs. The audit found no critical vulnerabilities. Shielded Labs and related teams are continuing their efforts to strengthen security, and further updates will be announced separately.
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Anthropic: Suspends All Access to Fable 5 and Mythos 5 Due to U.S. Government National Security Directive
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.
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Immunefi CEO claims AI models lead to surge in crypto security vulnerabilities
Odaily, Mitchell Amador, CEO of bug bounty platform Immunefi, stated at the WAIB Summit that new AI models such as Claude Opus 4.8 and ChatGPT 5.5 are shifting the balance of cybersecurity offense and defense in favor of attackers, leading to a resurgence in crypto hacks in 2026. Data from DefiLlama shows that in April 2026, illicit actors stole over $634 million from crypto platforms, the highest monthly total since the Bybit hack in February 2025 drove losses of approximately $1.4 billion.Amador stated that the crypto industry is in a critical survival period for the next three to four years until security teams leverage similar AI models to build codebases that attackers cannot breach; if the industry adopts more crowd-sourced security solutions, this timeline could be shortened to within two years. The latest Claude Mythos model, Fable 5, from AI company Anthropic, previously raised concerns about accelerating the ability to exploit crypto vulnerabilities.Anthropic stated that Fable 5 has safeguards in place that will redirect topics related to cybersecurity and similar fields to Claude Opus 4.8. On April 19, an attacker transferred approximately 116,500 restaked Ethereum (rsETH) from Kelp DAO's LayerZero-based rsETH bridge, valued at around $290 million to $293 million at the time. Cross-chain protocol LayerZero stated that the 1/1 decentralized verification network configuration of Kelp DAO relied on a single verification path for processing cross-chain messages, creating a single point of failure. (Cointelegraph)
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Anthropic CEO: Governments Should Have the Power to Block New Model Deployment
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)
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Anthropic to launch Claude Fable today, a security-hardened version of the Mythos model
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.
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