Opus 5.5 still tops AA intelligence, but GPT-6.1 Sol shifts the cost frontier
rhiever · reddit · 2026-09-30
A Reddit user compared reasoning-effort settings across models using Artificial Analysis's Intelligence Index and per-task benchmark costs. Opus 5.5 still leads on intelligence, but GPT-6.1 Sol moves the cost frontier, offering far better price-performance at comparable capability levels. Costs include caching and reasoning tokens, not subscription prices. Source: artificialanalysis.ai.
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