Arena 宣布 Anthropic 的 Claude Haiku 5.5 (High) 上线 Agent Arena，基于超 20.5K 真实智能体会话，净提升 +1.48%，总排名第 27。
Claude Haiku 5.5 (High) by @AnthropicAI has landed in the Agent Arena! Across +20.5K real-world agentic sessions from our global community of users, this release scored +1.48% net improvement and landed at #27 overall.
It's strongest Agent Arena category is Code, where it ranks #15 with +4.83% net improvement.
Haiku 5.5 shows cost efficiency with a median cost per task of $0.09, placing it just outside the Agent Arena Pareto frontier. Nearby on the Pareto frontier, GPT-6 Luna (Max) delivers +3.19% at $0.08/task.
Compared to GPT-5.4 (High) priced at $0.63/task in the #26 spot, Haiku 5.5 costs 86% less. Although Haiku 5.5's net improvement score is lower than other Anthropic models, this model is 97–99% cheaper per task than Claude Sonnet 5.5 (Max), Fable 5.1 (Max), and Opus 5.5 (Max).
Congrats again to the @AnthropicAI team on this release!
Real-world results are in for Claude Haiku 5.5 (High) by @AnthropicAI. Debuting at #30 with 1587 pts in Code Arena: WebDev, this release sits just outside the Pareto frontier while still offering strong cost efficiency. It matches GPT‑6 Luna’s price at $0.10/$0.50 per 1M input/output tokens while scoring six pts higher. Compared with other Claude models, Haiku 5.5 offers: - 90% lower cost than Haiku 4.5 at +257 pts - 95% lower cost than Sonnet 5.5 (High) at -128 pts - 98% lower cost than Opus 5 (High) at -70 pts - 99% lower cost than Fable 5.1 (Max) at -157 pts Congrats to the team at @AnthropicAI on this release!在 X 查看被引用的帖子
来源：Arena.ai · x.com