Opus 5 edges GPT-5.6 Sol on intelligence, costs twice as much

Artificial Analysis numbers cited in the post score Opus 5 at 61 vs GPT-5.6 Sol's 59 on intelligence; Sol runs $1.23 per task vs Opus's $2.34. The post calls the mid tier 'worse for Anthropic': GPT-5.6 Terra scores 55 against Sonnet.