THE HALFAX HEIMDALL AUGUR

On Tuesday, Anthropic said it was making an altered version of Mythos available to the public, promising “new guardrails” that thwart the model’s best-in-class performance in hacking & bioweapons research.via @derekbjohnson.bsky.social www.youtube.com/shorts/9OUhu... | cyberscoop.com/anthropic-cl...

Anthropic’s Claude Fable 5 is out for public use, with safeguards for high-risk requests Days after publishing research on how advanced AI systems could amplify cyber operations in the wrong hands, Anthropic released Claude Fable 5, a Mythos-class model for general u… #anthropic #claude #hackernews

Using Claude Fable 5 means opting into data collection | Mashable Anthropic is changing its data retention policies for its new Mythos-class models. Credit: Nicolas TUCAT / AFP via Getty Images Anthropic just released its most powerful public model yet — Claude Fable 5. However, along with the model's release, the AI giant also made a significant update to its data retention policies. Fable 5 was released to the public on Tuesday. Fable 5 is a "safe for general use" version of Anthropic's most powerful model, Mythos, which has been restricted from public use due to its potentially dangerous cybersecurity capabilities . Anthropic created a set of safety guardrails for Fable 5, and its benchmarks blow away much of the competition, per Anthropic. But it looks like Anthropic has also blown away its data retention policies for Fable 5. You May Also Like "To ensure we’re responsibly deploying Mythos-class models, we are requiring limited data retention and review as part of our safety work," reads an update on Anthropic's official Claude support page. "Prompts submitted to, and outputs generated by, Mythos-class models are retained for 30 days for trust and safety purposes, on every pla…

Anthropic confirms Claude Mythos-class models will roll out to the public Anthropic has confirmed that it plans to bring Mythos-class models to the general public after delaying the rollout due to security risks to public and private software. [...] #anthropic #claude #hackernews

The new politics of frontier AI In June 2026, Anthropic released Claude Fable 5, the first publicly available version of a new and more capable class of models it called Mythos. Three days later, the company shut...

Claude Fable 5 and Claude Mythos 5 - Anthropic Announcements Claude Fable 5 and Claude Mythos 5 Jun 9, 2026 Update Claude Mythos 5 and Fable 5 access unavailable Jun 12, 2026 We are suspending access to Claude Fable 5 and Claude Mythos 5. We apologize for this disruption to our customers and are working to restore access as soon as possible. Read more Today we’re launching Claude Fable 5 : a Mythos-class 1 model that we’ve made safe for general use. Fable 5’s capabilities exceed those of any model we’ve ever made generally available. It is state-of-the-art on nearly all tested benchmarks of AI capability, showing exceptional performance in software engineering, knowledge work, vision, scientific research, and many other areas. The longer and more complex the task, the larger Fable 5’s lead over our other models. Releasing a model this capable comes with risks. Without safeguards, Fable 5’s capabilities in areas like cybersecurity could be misused to cause serious damage. We’ve therefore launched the model with safeguards that mean queries on some topics will instead receive a response from our next-most-capable model, Claude Opus 4.8. To release the model both safely and quickly, …

Anthropic apologizes for hidden Fable throttling, pledges transparency Anthropic has apologized for secretly implementing throttling measures on its AI model,Claude Fable 5, through invisible guardrails, which have impeded users including researchers and competitors. The company announced it will now be more transparent about when these restrictions are activated, even if this results in Fable rejecting more queries. We’re rolling out changes to make Fable 5’s safeguards for frontier LLM development visible. Starting this week, flagged requests will visibly fall back to Opus 4.8—the same as our safeguards for cyber and bio. You will see this every time it happens. On the API, any flagged… — ClaudeDevs (@ClaudeDevs)June 11, 2026 Fable is the inaugural model in Anthropic’s Mythos class of AI systems, which the company has cautioned could pose significant risks if released widely. In response to these risks, Anthropic launched Fable with built-in safeguards tailored to prevent it from answering certain “high-risk” queries, particularly relating to model distillation. Don't miss out on the latest insights, trends, and analysis in the world of data, technology, and startups. Subsc…

🤖 [AI] BREAKING: ANTHROPIC OPENS MOST POWERFUL AI MODEL TO PUBLIC DUBBED FABLE 5, THE MODEL IS THE FIRST FROM THE MYTHOS CLASS — ANTHROPIC’S MOST ADVANCED LINEUP OF AI TECHNOLOGY, UNVEILED IN APRIL BUT RESTR... - $SOURCE$ ⚡ Live alerts: https://t.me/tickertap_alerts

Claude Mythos goes public in restricted Fable 5 model - 9to5Google As AI models get more powerful, there’s also going to be a level of danger. Anthropic announced Mythos not long ago as a model that was too dangerous for public availability, but a new version of that, Claude Fable 5, is now available and, apparently, “safe for general use.” In a post today, Anthropic explains that Claude Fable 5 is a “Mythos-class” model that’s available for public use and exceeds the capabilities of any other generally available AI model Anthropic has ever published. Fable 5’s capabilities exceed those of any model we’ve ever made generally available. It is state-of-the-art on nearly all tested benchmarks of AI capability, showing exceptional performance in software engineering, knowledge work, vision, scientific research, and many other areas. The longer and more complex the task, the larger Fable 5’s lead over our other models. The fear with Mythos was mainly around cybersecurity, as the modelwas quickly foundto be able to find and use exploits in the digital world. With Fable, Anthropic says that safeguards are in place and that, if a topic comes up that Fable isn’t allowed to interact with…

Anthropic releases Mythos-like AI model to the public, Claude Fable 5 Two months afterAnthropicrolled outMythosto a limited number of users, citing concerns about theartificial intelligencemodel's potential to do damage in the wrong hands, the company said it's ready to release an equally powerful model to the public. Anthropic on Tuesday announced Claude Fable 5, a Mythos-class model that will be available to its enterprise customers and paid subscribers. The company said the broad release is possible because of new safeguards that block responses in specific high-risk areas, including cybersecurity and biology. "For us, it's really around what we call 'race to the top,' being able to provide this technology in a valuable fashion, and at the same time providing the right safety guardrails so that it can do asymmetrically more benefits than harm," Dianne Penn, Anthropic's head of product management for research, told CNBC in an interview. Anthropiccaptivated Wall Streetandgovernment officialsin April with theunveiling of Mythos, which excels at identifying security flaws within software. The company said it did not plan to make the model generally available, and it has limited …

Anthropic releases ‘safe’ version of Claude Mythos AI model to public <p>AI company restricted access to Fable 5, its most powerful Mythos model, for months over cybersecurity concerns</p><p><a href="https://www.theguardian.com/technology/2026/may/28/anthropic-ai-valuation">Anthropic</a>, the maker of the Claude artificial intelligence (<a href="https://www.theguardian.com/technology/artificialintelligenceai">AI</a>) models, made a new version of its technology available to the general public on Tuesday while restricting its use in sensitive areas.</p><p>Dubbed Fable 5, the model is the first to be made widely available from the company’s new Mythos class – its most advanced lineup of AI technology, unveiled in April but <a href="https://www.theguardian.com/technology/2026/apr/08/anthropic-ai-cybersecurity-software">restricted</a> to a small set of partner institutions for months over cybersecurity concerns.</p> <a href="https://www.theguardian.com/technology/2026/jun/09/anthropic-claude-mythos-ai-model">Continue reading...</a>

Anthropic's new Claude Fable 5 is the same base model as Mythos but with guardrails attached Claude Fable 5 brings Mythos-class AI coding power to general users, but with cybersecurity guardrails, fallback models, and pricing that could make developers think twice. #anthropic #claude #hackernews

Claude Fable 5 secretly throttled AI researchers, and the internet went wild Claude Fable 5 gave users access to Mythos-class power, but its hidden safeguards turned a safety feature into a trust problem for Anthropic. #anthropic #claude #hackernews

🧠 Anthropic releases Claude Fable 5 Ultracode, a model variant designed for coding tasks. Researchers explore applications of Claude in med… 💬 Hacker News 🔗 https://github.com/joelparkerhenderson/ai-medical-diagnosis-examples/blob/main/doctor-perspective/claude-fable-5-ultracode/index.md #AI #tech

Anthropic's Claude Fable is a version of Mythos the public can access ... Anthropic is bringing its most powerful AI model to the general public for the first time, but it’s doing it with guardrails. On Tuesday, the AI firm launched Claude Fable 5, the first publicly available version of its Mythos model. Anthropic says Fable 5 excels at software engineering, knowledge work, and vision, but it comes with hard safety limits. In high-risk areas like cybersecurity, biology, chemistry, anddistillation, the model blocks responses and falls back to Claude Opus 4.8. Launched as a preview in April, Mythos was initially limited to a handful of partners due to cybersecurity concerns. Last week, Anthropicexpanded access to hundreds of organizationsacross 15 countries, again focusing on organizations that manage critical infrastructure. Now a version of that technology is available to anyone through Anthropic’s Claude API and consumption-based Enterprise plans. Access on subscriptions will roll out in stages: Through June 22, Fable 5 will be included in Pro, Max, Team, and seat-based Enterprise plans at no extra cost. On June 23, Anthropic will pull Fable 5 from those plans, requiring usag…

🧠 Anthropic releases Claude Sonnet 5, an updated version of their mid-tier language model. The new model offers improvements in reasoning and coding tasks compared to its predecessor. 💬 Hacker News 🔗 https://www.coderabbit.ai/blog/claude-sonnet-5-review #AI #tech

Anthropic rolls out public version of Mythos without cybersecurity capability <p>Anthropic is rolling out a public version of its Mythos AI model, but with guardrails barring its use in ​risky areas such as cybersecurity, after an earlier preview this year sent shockwaves globally for its ability to find software flaws.</p> <p>The new Claude Fable 5 is the most powerful model Anthropic has ever made for wider use, the startup said on ​Tuesday, touting its performance in software engineering and analytics.</p> <p>Anthropic has so far ​limited its access to a group of about 200 organisations, including ⁠the US government under the Glasswing program, after announcing in April that ​Mythos had uncovered thousands of software vulnerabilities.</p> <p>Offering its capabilities more widely may allow the $965 ​billion company to extend the momentum that has powered its valuation above rival OpenAI just as the two startups at the centre of the AI industry race to go public.</p> <p>The ​company said it had done extensive testing to ensure that users could not ​manipulate the new model to bypass its guidelines and perform restricted actions.</p> <p>“Let’s say I’m a ‌college ⁠student asking th…

Anthropic releases Mythos version of AI model Anthropic has launched Claude Fable 5, a powerful AI model now publicly available. This release follows extensive safety measures to prevent misuse in high-risk fields. Fable 5, designed for complex tasks, is priced competitively and offers enhanced token efficiency, marking a significant step in making advanced AI more accessible.

Claude Sonnet 5 includes safeguards against dangerous cyber use Anthropic has introduced Claude Sonnet 5, the latest version of its general-purpose AI model, with improved reasoning, coding, tool use, and knowledge work capabilities. The model can make plans, use too… #anthropic #claude #hackernews

POLITICO 6/9/26 "Anthropic on Tuesday unveiled a new “Mythos-class” model for general use, as concerns around the release of advanced artificial intelligence tools with powerful hacking capabilities deepen." www.politico.com/news/2026/06...

Anthropic rolls out Claude Fable 5, but it's available for a limited time Anthropic has begun rolling out a new model called "Fable," which is based on the same underlying model as Mythos, its most powerful AI model class. [...] #anthropic #claude #hackernews

Anthropic launches Claude Opus 4.8, prepares Mythos-class models for all customers Anthropic has released Claude Opus 4.8 and outlined plans for broader access to its Mythos-class models, which the company expects to make available to all customers in the coming week… #anthropic #claude #hackernews