When we released Claude Opus 4.5, we knew future models would be close to our AI Safety Level 4 threshold for autonomous AI R&D. We therefore committed to writing sabotage risk reports for future frontier models. Today we’re delivering on that commitment for Claude Opus 4.6.

Rather than making difficult calls about blurry thresholds, we decided to preemptively meet the higher ASL-4 safety bar by developing the report, which assesses Opus 4.6’s AI R&D risks in greater detail. Read the sabotage risk report here: