Today on the AI Daily Brief, are we entering the era of vertical AI models?

Before that in the headlines, a big leak with Anthropic confirming the existence of Claude Mythos,

what they call by far the most powerful AI model we've ever developed.

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And if you are interested in sponsoring the show, send us a note at sponsors at AIDailybrief.aI.com. Late breaking one last night, a data leak revealed that

Anthropic is testing a new model referred to as Claude Mythos. Anthropic has confirmed the

existence of this model, with a spokesperson saying that it was a step change, their words,

in performance, and quote, the most capable we've built to date.

They said the model is currently being trialled by early access customers.

So here's what happened.

On Thursday evening, a draft blog post describing the model was left in an unsecured publicly

searchable database.

The blog post says, we've finished training a new AI model, Claude Mythos. It's by far the most powerful AI model we've ever developed. Mythos they write is a new name for a new tier of model, larger and more intelligent than our Opus models, which were until now, are most powerful. We chose the name to evoke the deep connective tissue that links together knowledge and ideas. Compared to our previous best model, Claude Opus 4.6,

Mythos gets dramatically higher scores on tests of software coding, academic reasoning, and cybersecurity

among others. In preparing to release Claude Mythos, however, they say, we want to act with

extra caution and understand the risks that poses, even beyond what we learn in our own testing.

In particular, we want to understand the model's potential near-term risks in the realm of cybersecurity and share the results to help cyber defenders prepare. Mythos is also a large compute-intensive model. It's very expensive for us to serve and will be very expensive for our customers to use. We're working to make the model much more efficient before any general release. For those reasons, we're taking a slower, more gradual approach to releasing Mythos than we have with our other models. We're beginning with a small number of early access customers, who will explore the model cybersecurity applications and report back what they find. Now, this blog post is very undercooked. It ends not too long after that. Now, if you hear the term Capybara thrown around, apparently the model was also referred to as that. I'm not sure if Capybara was the codename, and Mythos is the intended launch name. But regardless, this draft blog post was in a cache of unsecured documents. In total Fortune reports, there appear to be close to 3,000 assets linked to Anthropics blog that had not previously

been published.

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