Agent Index composite ranks Opus 5.5 first at 90.4 across 26 agent-capable models
anitakirkovska · reddit · 2026-11-06
A new composite, Agent Index, aggregates published results across seven practical agent dimensions — browsing, terminal use, coding, document understanding, professional deliverables, multi-step workflows, and reasoning — with fixed-point normalization weighted toward browsing, workflows and deliverables; models must have results on all seven to qualify.
The November snapshot includes 26 models: Opus 5.5 leads at 90.4, followed by Astra at 87.6 and Sonnet 5.5 at 85.8 (relative composite scores, not success rates). The author invites critique on benchmark redundancy, the all-seven entry bar, and whether weights match real-world agent work.
Related event: Homemade Agent Index Ranks Claude Opus 5.5 on Top(2 posts)→
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