Claude Opus 5.5 tops Artificial Analysis' revised AI index with 58 points

Artificial Analysis released Intelligence Index v5 on October 27, placing 60% of the score on private test sets or held-out answers to make the leaderboard harder to game. The revision adds benchmarks for coding and terminal-based scientific work, changes the index's category weights, and introduces a second measure for tracking model capability over time. Claude Opus 5.5 tops the revised index with 58 points, and Artificial Analysis says buyers should treat v5 as a revised measurement system rather than a directly comparable continuation of earlier rankings.

Claude Opus 5.5 tops Artificial Analysis' revised AI index with 58 points The October 27th update adds coding and scientific-work benchmarks, puts 60% of the score on private or held-out answers, and introduces a separate capability trend index. By Ryan Merket https://runtimewire.com/author/ryan-merket · Published Primary source: x.com https://x.com/ArtificialAnlys/status/2115265133467635877 Why it matters Artificial Analysis is making contamination resistance a defining feature of its leaderboard while changing the tests and weights that determine scores. Buyers get a broader comparison that includes task costs, but should treat v5 as a revised measurement system, not a directly comparable continuation of earlier rankings. Artificial Analysis says 60% of its Intelligence Index v5 now rests on private test sets or held-out answers, as the model evaluator tries to make its leaderboard harder to game. The October 27th release also adds benchmarks for coding and terminal-based scientific work, changes the index's category weights, and introduces a second measure for tracking model capability over time. The company laid out the update in its announcement article https://artificialanalysis.ai/articles/artificial-analysis-intelligence-index-v5 and X thread https://x.com/ArtificialAnlys/status/2115265133467635877 .… When you purchase through links in our articles, we may earn a small commission https://runtimewire.com/affiliate-monetization-standards . This doesn’t affect our editorial independence.