Claude Opus 5.5 (High) hits #2 on Agent Arena, costs 56% less than Opus 5 (Max)

Claude Opus 5.5 (High) 进入 Agent Arena 第 2 名，成本比 Opus 5 (Max) 低 56%

Anthropic's Claude Opus 5.5 (High) reached #2 on Agent Arena with a +12.15% net improvement, behind only Fable 5.1 (Max). It also costs 56% less than Opus 5 (Max). The post doesn't disclose exact pricing or latency—I'd discount the cost claim until we see real usage numbers.

Why it matters: Opus 5.5 landing #2 on Agent Arena with a claimed 56% cost cut makes it a notable Anthropic update today. Score capped below 85 because the post omits pricing and latency — the cost advantage needs real-world confirmation.