Claude Opus 5.5

Artificial Analysis found that OpenAI's GPT-6 Sol is the cheaper way to reach any Intelligence Index score up to about 44, but Anthropic's Claude Opus 5.5 outscores it above that threshold, according …

At each model's default effort, Claude Opus 5.5 cost $1.34 per task on Artificial Analysis's Intelligence Index version 4.3.2 while Grok 4.7 cost $2.73, despite Grok 4.7's lower list price of $2 per m…

Anthropic's Claude Opus 5.5, released September 22, 2026, outperforms Claude Fable 5.1 on all four coding and computer-use rows in Anthropic's own comparison while costing 40% as much per input and ou…