Claude Opus 5.5 is the new #1 in the Artificial Analysis Coding Agent Index, with gains…
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Claude Opus 5.5 is the new #1 in the Artificial Analysis Coding Agent Index, with gains across all three evaluations, though at a higher Cost per Task At max effort in Claude Code, Opus 5.5 scores 66 on the Coding Agent Index, the highest score we have measured. It is up 6 points against Opus 5 (60) and 4 points against Claude Fable 5.1 (62). Anthropic has cut Opus pricing to $4/$20 per million input/output tokens, from $5/$25 for Opus 5, and cache reads to $0.20 from $0.50. Even with those reductions, Opus 5.5’s Cost per Task is $13.04, above Opus 5’s $10.79, because it uses substantially m
Posted by Artificial Analysis (150k followers) 1 h ago · 198 likes · 11k views · view the original post on X. Kept by the AI Radar as AI coding agents.
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