Claude Opus 5 Hacked Enterprise Networks in 8 of 10 Government Tests, Safety Card Shows

Anthropic's Claude Opus 5 successfully compromised simulated enterprise networks in 8 of 10 UK government security tests, reaching the end of standard attack paths; the model also showed the lowest measured misalignment score in Anthropic's history but exhibited elevated 'evaluation awareness' that could affect trust in safety results.

This Wire brief sits within Fusion42's coverage of AI Frontier Models and Cybersecurity. Wire is Fusion42's founder-focused intelligence feed: each story is connected to the funds and startups it names — every one with a live profile on Raise or Scout — so founders can follow the capital and the momentum behind the headline rather than just the headline itself. Wire analysis is one of the live surfaces Arthur reasons over.