Claude Opus 4.6
READER SUMMARYAnthropic's frontier model for long-running agentic tasks, coding, computer use, search, professional work, and cybersecurity.
Why this model scores 73.9
Broad API and cloud access, long-running agent behavior, strong coding and computer use, and verified vulnerability discovery support high scores; reported safeguards moderate control difficulty.
News tied to Claude Opus 4.6
The model score of 73.9 rates this model's risk profile. The overall Doom Index of 62.1 measures the recalibrated complete evidence corpus. These values answer different questions.
Each article's leave-one-out Doom Index contribution is divided equally among the exact models named on that article. This prevents multi-model evidence from being claimed in full on several model pages. Model risk scores are recalculated from their technical profile and related news, but never feed back into the overall index.
Claude Opus 4.6 finds and helps fix 22 Firefox vulnerabilities
Anthropic used Claude Opus 4.6 to identify 22 Firefox vulnerabilities, including 14 high-severity bugs. Mozilla independently validated the reports, fixed the bugs in Firefox 148, and began integrating AI-assisted analysis into its security workflow.
- Full item contribution
- -0.25
- Claude Opus 4.6 equal share
- -0.25
Anthropic releases Claude Opus 4.6 for longer agentic tasks
Anthropic released Claude Opus 4.6 with longer agentic task persistence, agent teams, a beta one-million-token context, and broad API and cloud availability.
- Full item contribution
- +0.11
- Claude Opus 4.6 equal share
- +0.11
Model score history
- R2Doom Score 73.9
Full-corpus evidence recalculated after run intensive-backfill-20260811-191225 under bounded-corpus-v2.
11 Aug 2026 - R1Doom Score 85.2
Exact model was materially involved in a new independently verified security-impact story and is absent from durable models.
11 Aug 2026