AI enthusiasts have been aflutter since rumors first leaked in April about Anthropic's Claude Mythos Preview -- an AI model that the company claimed could sniff out so many cybersecurity ...

In April 2026, Anthropic stated that Claude Mythos Preview could vastly outperform humans at finding vulnerabilities in ...

Anthropic is pricing both Fable 5 and Mythos 5 at $10 per million input tokens and $50 per million output tokens. The company says that is less than half the price of Claude Mythos Preview ...

Anthropic refused to release Claude Mythos after internal testing reportedly showed the AI could autonomously discover and exploit serious cybersecurity vulnerabilities. The decision highlights ...

Anthropic, fresh off becoming the most valued frontier AI lab in the game and announcing plans for its initial public offering, has expanded access to Claude Mythos Preview, its model that would ...

The new classifier in Fable 5 blocks the jailbreak technique that prompted the US export controls “in over 99% of cases” ...

Anthropic initially made users of the Claude Mythos Preview model sign confidentiality agreements to prevent findings from being shared, according to the Wall Street Journal, but the Journal says that ...

Only a handful of users have access to Anthropic's Mythos tool. Mozilla is one, and it says it found hundreds of security bug fixes.Samuel Boivin/NurPhoto via Getty Images AI is getting scary good at ...

The the launch of Claude Mythos is a truly “watershed moment” in cybersecurity with major implications for the industry, now & in the future.

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On benchmarks, Opus 4.8 is a step up rather than a leap. It scores 88.6% on SWE-bench Verified (vs. 87.6% for Opus 4.7), 69.2% on the harder SWE-bench Pro (vs. 64.3%), and 74.6% on Terminal-Bench 2.1 ...