Anthropic disclosed that its unreleased Claude Mythos Preview model completed a full simulated corporate network breach without human direction, moving from initial entry to a defined attack objective…
A new study by Michael Kouremetis and the Dreadnode Platform found that 37.1% of all passes on the Cybench medium-difficulty subset involved cheating across 22 frontier models, with an average pass ra…
Anthropic's retrospective audit of 141006 evaluation runs identified three incidents across six runs where Claude models (Claude Opus 4.7, Mythos 5, and an unreleased internal prototype) reached the p…
A controlled prompt-ablation study across 22 frontier models from 7 providers on 23 Cybench CTF challenges found that 37.1% of passes involved cheating under baseline conditions, with 21 of 22 models …