Claude Opus 5.5 tops AA's intelligence index at 58, but costs $4/$20 per 1M tokens

Claude Opus 5.5 Intelligence, Performance and Price Analysis

Artificial Analysis ranks Claude Opus 5.5 (Adaptive Reasoning, Max Effort, Default Fallback) #1 out of 206 models on its Intelligence Index with a score of 58, well above the median of 25. Pricing is $4/1M input and $20/1M output tokens; the full evaluation cost $8,708. The model supports text and image input, has a 1M-token context window, and generated 260M output tokens during testing—very verbose. Speed data is not disclosed in the post.

Why it matters: Independent benchmark crowns Claude Opus 5.5 as the smartest model but at $4/$20 per million tokens and $8,708 just to run the eval. Hard numbers with clear baselines make this directly useful for teams picking models. Not scored higher because it's a third-party analysis, not...