Agent Arena updates Bash Reliability metric; Claude Opus 5.5 tops leaderboard
arena · x · 2026-10-14
The Agent Arena leaderboard upgraded its Bash Recovery metric to Bash Reliability, analyzing each bash call's purpose, outcome, and error cause so only agent-caused failures count.
Current top ranks: Claude Opus 5.5 (Max) leads with 16.77% net improvement, followed by GPT 6.1 Sol (Max) at 15.31%, then Claude Fable 5.1, GPT 6 Astra, and Gemini 4 Argon. Rankings draw on 2.53M real sessions across 52 models, tracking task success, user satisfaction, steerability, tool hallucination, and per-task cost.
Related event: Agent Arena Update: Claude Opus 5.5 Tops Ranking as Bash Reliability Debuts(6 posts)→
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