Firms nudged to go for Anthropic’s Opus 4.7 as Mythos AI stays elusive

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Anthropic’s latest AI model Claude Opus 4.7 is one of the best bets for organisations to plug cybersecurity vulnerabilities as the company’s most powerful cyber-focused model Mythos continues to remain inaccessible for most companies, cybersecurity experts and analysts told ET.

Opus 4.7 delivers about three-fourths of Mythos-level capability while remaining deployable and commercially usable with built-in safeguards against misuse, they noted.

“Opus 4.7 has 70-80% of the capabilities of Mythos and we are recommending that organisations use Opus to fix gaps in their systems till Mythos access is not available,” said Sangeeta Gupta, chief strategy officer of Nasscom.

Anthropic in a blog said it deliberately reduced Opus 4.7’s cyber capabilities during training compared to Mythos and introduced safeguards that automatically detect and block requests linked to prohibited or high-risk cybersecurity use cases.

According to Anthropic, Mythos scored 83.1% on CyberGym, a cybersecurity capability benchmark developed by researchers at the University of California, Berkeley, while Opus 4.7 scored 73.1%.

The company said Opus 4.7 as the first model on which it has tested its new cybersecurity safeguards before any broader Mythos release.