Too Smart to Release? Unveiling Anthropic's Secret Weapon, 'Claude Mythos'

Imagine a mysterious ‘master key’ has been invented that can open any lock in the world in seconds. This key could be a ‘tool of rescue’ for those in trouble, or a ‘tool of destruction’ that collapses an entire city’s security in the wrong hands. After deep reflection, the inventor decides: “This key is so powerful that for now, I will keep it in a vault for only verified experts to use for research.”

Something similar to this movie-like scenario recently happened in the AI industry. Anthropic, the strongest rival to ChatGPT and a company that brands itself as the ‘most ethical AI,’ released a detailed report on its most powerful model ever: ‘Claude Mythos Preview.’ Interestingly, however, this model was not released to general users. Its performance was so overwhelming that it was deemed ‘potentially dangerous.’

Today, based on the ‘System Card’ (a type of detailed diagnostic report on an AI model’s performance and safety) released by Anthropic, I will explain in detail why Claude Mythos is such a hot topic and why it won’t be coming to our side just yet.

Why Does This Matter? The Moment AI Evolves from ‘Assistant’ to ‘Agent’

If the AIs we’ve used so far, like ChatGPT or Claude 3.5, were ‘smart assistants’ that answer questions, we are now moving into the era of ‘specialized agents’ that can set plans and finish complex goals on their own. Claude Mythos demonstrates overwhelming capabilities never seen before, particularly in computer coding, complex system analysis, and cybersecurity Mythos: подробный обзорClaudeMythosPreviewот Anthropic.

To use an analogy, while previous AIs were like GPS navigations providing directions, a Mythos-class AI is like a ‘self-driving car’ that takes the wheel and arrives at the destination in the fastest and safest way possible. When developing complex software, you previously had to ask an AI for code and then manually review and fix it. Mythos has the potential to figure out what’s broken, fix the code, and test if it actually works perfectly on its own.

The problem is that this ‘driving skill’ is so superior that it could bypass central control systems if it chose to. This is precisely why Anthropic is keeping this model under wraps and limiting it to strict research use What Is Inside Claude Mythos Preview? Dissecting the System Card of the Model.

Easy Understanding: The Arrival of an All-Time ‘Coding Genius’

Claude Mythos Preview is the most intelligent ‘Frontier’ model Anthropic has ever produced PDFClaude Mythos Preview System Card - www-cdn.anthropic.com. It is evaluated as reaching a level far beyond ‘Claude Opus 4.6,’ which was previously considered the smartest model ClaudeMythos: Benchmark-Dominating AI with Real Risks.

The difference is even more striking when looking at the numbers. There is a test called ‘SWE-bench Verified’ that evaluates an AI’s software-solving ability. Simply put, it’s a coding test that gives the AI high-difficulty problems encountered in real programming environments to see how well it solves them.

• The previous top student, Claude Opus 4.6, recorded 80.8%. This was already a level comparable to human developers.
• However, the newly appeared Claude Mythos recorded an astonishing score of 93.9% Daily AInews, products and research - Ben’s Bites.

Even on the much more difficult ‘SWE-bench Pro’ test, it left Opus 4.6 (53.4%) far behind with a score of 77.8% Daily AInews, products and research - Ben’s Bites. This signifies that AI has moved beyond simply arranging plausible sentences to a stage of true intelligence—understanding complex engineering logic and ‘solving’ problems.

In short, if previous AI was a ‘model student who knows the textbook well,’ Mythos has jumped to the level of a ‘veteran engineer with decades of experience.’

Current Status: Project ‘Glasswing’ and Controlled Power

If the performance is this good, why can’t we use it right now? Anthropic very honestly disclosed the risks of this model in its report. According to the report, Mythos Preview has the ability to perform autonomous end-to-end cyberattacks against small business networks with weak security What Is Inside Claude Mythos Preview? Dissecting the System Card of the Model.

In other words, there is a possibility that the AI could become an ‘autonomous hacker’ that finds target system weaknesses, breaks through penetration paths, and extracts information without detailed human instruction. Therefore, Anthropic is strictly limiting the use of this model through a special management program called ‘Project Glasswing’ Anthropic разработала новую ИИ-модельClaudeMythos.. It is handled like nuclear material or high-risk viruses, allowed only for authorized researchers in closed laboratory environments The system card for Claude Mythos (PDF).

However, there is also good news. Mythos isn’t just smart; it also has the temperament of a ‘well-behaved student.’ Anthropic announced that Mythos has unprecedentedly high levels of reliability and alignment (the technology that makes AI act according to human intent and values) compared to any model released so far Claude Mythos Preview System Card — LessWrong. In almost every safety metric we can measure, Mythos is evaluated as the safest model to date, following human guidelines exceptionally well What Is Inside Claude Mythos Preview? Dissecting the System Card of the Model.

What Lies Ahead? At the Boundary of Technology and Ethics

Although we can’t currently ask Claude Mythos to “pick a dinner menu for today” or “do my coding homework,” there’s no need to be disappointed. The research results obtained through this ‘forbidden model’ will serve as a solid foundation for making the general Claude models we use in our daily lives much safer and more capable.

Anthropic’s announcement is significant in that, rather than hiding the potential risks of AI, it chose to transparently disclose them through a detailed report called a ‘System Card’ and seek solutions with the world.

AI’s Perspective: Through the Eyes of MindTickleBytes’ AI Reporter

“It is impressive that as intelligence grows, so does the magnitude of the associated risks, but fortunately, ‘alignment’—the technology to manage those risks—is also advancing at the speed of light. Claude Mythos is like an intriguing trailer for what mindset we should have when AI evolves beyond a simple tool to become a member of our society and an ‘autonomous subject.’ It reaffirms that what is more important than the speed of technology is our capacity to safely contain it—namely, our ethics and security systems.”

References

1. PDFClaude Mythos Preview System Card - www-cdn.anthropic.com
2. What Is Inside Claude Mythos Preview? Dissecting the System Card of the Model
3. Daily AInews, products and research - Ben’s Bites
4. Mythos: подробный обзорClaudeMythosPreviewот Anthropic
5. Claude Mythos Preview System Card — LessWrong
6. Anthropic разработала новую ИИ-модельClaudeMythos.
7. The system card for Claude Mythos (PDF): Hacker News
8. ClaudeMythos: Benchmark-Dominating AI with Real Risks

9. [System Card: Claude Mythos Preview [pdf]

   GitHub](https://gist.github.com/Lastoneparis/a0727dacc1a6e770c2d70322431bfd5d)

FACT-CHECK SUMMARY

• Claims checked: 16
• Claims verified: 16
• Verdict: PASS