Claude Haiku 5.5 (High) ranks #27 on Agent Arena

arena · x · 2026-10-14

Arena reposted Claude Haiku 5.5 (High)'s Agent Arena results: +1.48% net improvement across 20K+ real agentic sessions, #27 overall, strongest in Code at #15 (+4.83%), with a median cost of $0.09 per task. Same event as the main post.

Related event: Agent Arena Update: Claude Opus 5.5 Tops Leaderboard; Haiku 5.5 Debuts at #27(9 posts)→

Original post →

More from Models

Models channel →