King Claude.

English | Chinese Original

English translation of the Chinese original. This version is generated for international readers and may be refined over time.

Date: 2026-03-27

After the birth of Opus 4. 6, the Claude family welcomed the King.

A short while ago, the Monopoly of Fortune exploded - Anthropic accidentally leaked a new model that had not yet been published because of the CMS configuration error. Fortune first discovered and verified the draft documents stored in the publicly accessible data cache. ** The most powerful model, Claude Mythos, ** is in the public domain.

Claude Mythos, codenamed Capybara, representing the highest "level", is a landmark new model.

It's bigger and stronger than the strongest Opus series today.

Anthropic's existing product lines are divided into Haiku (the smallest and fastest), Sonnet (the middle), Opus (the strongest), and Capybara/Mythos will be the fourth tranche above Opus.

The leaking document shows that Mythos is "greater and stronger" than the strongest Opus 4. 6. It is not incremental, but rather a "eradicative" leap.

Internal test data indicate that Mythos achieved a significant leap in key dimensions, including software code**, academic reasoning, and network security**.

In a moment, the entire network blew up! More of Mythos' blasts were completely painted.

Archive in M1https://m1astra-mythos.pages.dev/You can see that.

Claude 4. 6 Opus's strength no longer needs to be said, but Mythos' presence is the real "terminator".

This level of cross-cutting is much more alarming than the growth of parameters.

However, strong capabilities are often accompanied by greater risks - the root cause of Mythos' absence.

According to a leaked draft blog, Anthropic found in an internal assessment that Mythos would pose an "unprecedented cybersecurity risk"**. This finding led the company to press the pause key and decided not to publish the strongest model that had been developed.

"Anthropic has not yet been issued because internal assessment is too dangerous." When the news came out, it blew up all over the Internet.

In fact, Anthropic has been known as "Responsible AI" and has invested heavily in model safety and alignment research. But when models are so powerful that even developers are disturbed, the game between commercial values and the security bottom line becomes extremely difficult.

Mythos' leak also allowed the outside world to see the struggle between the "capable ceiling" and the "safe red line".

On the one hand, continued breakthroughs in model capabilities are at the core of the competitiveness of technology firms; on the other hand, when model capabilities reach critical points of potential abuse, publication becomes an extremely complex issue.

At present, the Anthropic official has not officially responded to the leak. It is certain, however, that the very existence of Mythos has given the whole AI industry an irreconcilable proposition:

** When we have the capacity to create stronger AI, are we ready to take the risks it brings?**