techcrunchJul 9
Elon Musk praises Mythos/Fable, promises not to ‘cut off’ Anthropic
Should Anthropic trust Elon Musk to host its models? With about $40 billion in revenue at stake, Musk insists that the company can.
MYTHOS-26B-A4B-PRISM-PRO-DQ-GGUF news
33 articles mentioning MYTHOS-26B-A4B-PRISM-PRO-DQ-GGUF
techcrunchJul 1
Trump drops restrictions on Anthropic’s Mythos and Fable models
The Trump administration's erratic approach to AI policymaking has left companies across the industry with little clarity about what will govern future model releases.
thevergeJun 28
China’s Z.ai claims it can match Mythos on cybersecurity
China's Zhipu AI (Z.ai) released its open-weight GLM-5.2, and some researchers have claimed that it matches Mythos in certain bug-finding and cybersecurity scenarios. While GLM lags behind models from Anthropic and OpenAI in other, more general tasks, it seems that China has dramatically reduced the
techcrunchJun 27
Asian AI startups launch Mythos-like models as Anthropic’s export ban drags on
New models are launching in Asia that promise Mythos-like capabilities without fear of an export ban. U.S. AI labs may never recover this enormous market.
techcrunchJun 27
Trump administration releases Anthropic Mythos to be used by more than 100 US companies, agencies
Over 100 companies and government agencies are reportedly authorized to use Mythos 5, including their non-American employees.
thevergeJun 27
Anthropic’s Mythos 5 is back
After a rollercoaster negotiation process with the Trump administration that dragged on for two weeks, Anthropic's Mythos 5 is finally back in action - at least, somewhat, for a select group of organizations, according to a letter from the government to Anthropic that was viewed by The Verge. Fable
thevergeJun 26
Anthropic’s Mythos mess is only getting worse
It's been two weeks since Anthropic took its Mythos-class models offline after a Friday evening ultimatum from the Trump administration. The company sprang into action immediately, sending a barrage of executives to Washington, DC. But updates have been suspiciously lacking, with no resolution in si
techcrunchJun 19
From PGP to Mythos: a brief history of export controls that didn’t stop anyone
For the last 30 years, stopping the flow of cybersecurity-related software has proven to be ineffective. It's unclear why it would work now with Anthropic’s cybersecurity model Mythos.
thevergeJun 16
Inside the fight over Claude Mythos 5
As the rest of the country celebrated the USA's first World Cup win and the New York Knicks championship, Anthropic spent its weekend fighting the Trump administration over its latest model release. At 5:21 PM on Friday, the company received a US export control directive to suspend access to its Myt
thevergeJun 14
China may have accessed Mythos
According to a new report from Semafor, the White House's decision to impose export restrictions on Anthropic's Mythos was driven in part by fears that it had been accessed by a group linked to China. If the Chinese government actually had access to Mythos 5 or Fable 5, it would present a serious na
thevergeJun 13
Anthropic cuts off Fable 5 and Mythos 5 access following government order
On Friday evening, the government ordered Anthropic to block access to Fable 5 and Mythos 5 for all foreign nations, both inside and outside the US, due to national security concerns. That order included employees of Anthropic. To meet those demands, the company has completely cut off access to the
thevergeJun 9
Anthropic releases its first Mythos-class model Claude Fable
Anthropic just announced Claude Fable 5, a new AI model it said is the most powerful model it has ever made widely available. According to the company, Fable 5 "shows exceptional performance in software engineering, knowledge work, and vision," with its lead over other models growing as tasks become
techcrunchJun 9
Anthropic’s Claude Fable 5 is a version of Mythos the public can access today
Anthropic is releasing Claude Fable 5, its first Mythos-class model available to the public. The model comes with guardrails that block responses in high-risk areas like cybersecurity and biology.
mit-tech-reviewJun 5
The Meta hack shows there’s more to AI security than Mythos
On June 5, 404 Media reported that attackers had been using Meta’s AI customer support agent to steal Instagram accounts. Their approach was simple: They asked the agent to link the accounts to email addresses that they controlled, and the agent complied. One attacker broke into the dormant Obama Wh
techcrunchJun 2
Anthropic scales Claude Mythos to critical infrastructure in 15+ countries
Anthropic is expanding Project Glasswing, its security vulnerability program, and access to Mythos to 150 organizations across 15 countries — targeting critical infrastructure in power, water, healthcare, and communications where a cyberattack could affect 100 million people.
arxivMay 26
Demystifying the Mythos or Disrupting Bugonomics? From Zero-Day Asymmetry to Defender Remediation Throughput
arXiv:2605.24632v1 Announce Type: cross Abstract: Recent demonstrations of large language models producing candidate and confirmed vulnerabilities in production software have renewed the narrative that AI will reshape offensive and defensive security. Headlines emphasize capability; they rarely inte
thevergeMay 19
Google wants to compete with Anthropic’s Mythos
Google is making a big push into cybersecurity. At I/O, the company announced that it was inviting select groups of experts to test the API for CodeMender, an "AI agent for code security" it debuted last October. The difference is that Google is now making the tool more widely available externally -
arxivMay 19
Benchmarking Mythos-Linked Bug Rediscovery
arXiv:2605.17416v1 Announce Type: cross Abstract: Anthropic's April 2026 Mythos materials combine benchmark claims with concrete bug-finding stories across OpenBSD, FreeBSD, Linux, FFmpeg, and browsers. This paper reports a controlled target-file rediscovery experiment on six public or high-confiden
thevergeMay 11
OpenAI just released its answer to Claude Mythos
OpenAI is launching Daybreak, an AI initiative focused on detecting and patching vulnerabilities before attackers find them. Daybreak uses the Codex Security AI agent that launched in March to create a threat model based on an organization's code and focus on possible attack paths, validate likely v
techcrunchMay 7
How Anthropic’s Mythos has rewritten Firefox’s approach to cybersecurity
Security researchers at Mozilla say Anthropic's Mythos has unearthed a wealth of high-severity bugs in Firefox.
techcrunchApr 30
After dissing Anthropic for limiting Mythos, OpenAI restricts access to Cyber, too
OpenAI will begin rolling out its cybersecurity testing tool, GPT-5.5 Cyber only "to critical cyber defenders" at first.
thevergeApr 23
Anthropic’s Mythos breach was humiliating
Anthropic's tightly controlled rollout of Claude Mythos has taken an awkward turn. After spending weeks insisting the AI model is so capable at cybersecurity that it is too dangerous to release publicly, it appears the model fell into the wrong hands anyway. According to Bloomberg, a "small group of
arxivApr 23
Mythos and the Unverified Cage: Z3-Based Pre-Deployment Verification for Frontier-Model Sandbox Infrastructure
arXiv:2604.20496v1 Announce Type: cross Abstract: The April 2026 Claude Mythos sandbox escape exposed a critical weakness in frontier AI containment: the infrastructure surrounding advanced models remains susceptible to formally characterizable arithmetic vulnerabilities. Anthropic has not publicly
thevergeApr 22
Anthropic’s Mythos rollout has missed America’s cybersecurity agency
Several US federal agencies are taking up Anthropic's new cybersecurity model to find vulnerabilities, but one is reportedly not getting in on the action: the nation's central cybersecurity coordinator. On Tuesday, Axios reported that the Cybersecurity and Infrastructure Security Agency (CISA) didn'
techcrunchApr 21bearish
Unauthorized group has gained access to Anthropic’s exclusive cyber tool Mythos, report claims
Anthropic told TechCrunch it is investigating the claims, but maintains that there is no evidence that its systems have been impacted.
techcrunchApr 21
Sam Altman throws shade at Anthropic’s cyber model, Mythos: ‘fear-based marketing’
This week, during a podcast appearance, OpenAI CEO Sam Altman called out his competitor's new cybersecurity model, noting that the company was using fear to make its product sound more impressive than it actually is.
techcrunchApr 20
NSA spies are reportedly using Anthropic’s Mythos, despite Pentagon feud
NSA is said to be using Anthropic's restricted Mythos AI model.
arxivApr 18
Functional Emotions or Situational Contexts? A Discriminating Test from the Mythos Preview System Card
arXiv:2604.13466v2 Announce Type: replace-cross Abstract: The Claude Mythos Preview system card deploys emotion vectors, sparse autoencoder (SAE) features, and activation verbalisers to study model internals during misaligned behaviour. The two primary toolkits are not jointly reported on the most a
thevergeApr 16
Anthropic releases a new Opus model amid Mythos Preview buzz
Anthropic has released its most powerful "generally available" model to date: Claude Opus 4.7. The company called it a step up from Opus 4.6 for advanced software engineering tasks, particularly in complex coding areas that in the past required more hand-holding. It's also supposed to be better at a
techcrunchApr 14
Anthropic co-founder confirms the company briefed the Trump administration on Mythos
In an interview at the Semafor World Economy summit this week, Anthropic co-founder Jack Clark explained why the company was still engaged with the U.S. government while simultaneously suing them.
techcrunchApr 12
Trump officials may be encouraging banks to test Anthropic’s Mythos model
The report is particularly surprising since the Department of Defense recently declared Anthropic a supply-chain risk.
techcrunchApr 9
Is Anthropic limiting the release of Mythos to protect the internet — or Anthropic?
Anthropic said this week that it limited the release of its newest model, dubbed Mythos, because it is too capable of finding security exploits in software relied upon by users around the world. Are real cybersecurity concerns a cover for a bigger problem at the frontier lab?
techcrunchApr 7
Anthropic debuts preview of powerful new AI model Mythos in new cybersecurity initiative
The new model will be used by a small number of high-profile companies to engage in defensive cybersecurity work.