Inside Claude Opus 4.6: Anthropic's Most Capable and Scrutinized Model Yet
Feb 10, 2026AI Research·Noah Ogbi·11 minFeb 10
Anthropic's Claude Opus 4.6 system card documents sweeping capability gains alongside safety findings that are harder to dismiss than those of any previous generation. On cyber evaluations the model has hit a ceiling, on autonomous R&D it is approaching one, and the tools used to monitor it are struggling to keep pace.