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Arena.ai (Agent Arena)
AI Signal Ranking✦ L'AURA Certified
Crowdsourced human-preference leaderboard, now with a causal-tracing Agent Arena.
78MoatRank™
About
The leaderboard formerly known as LMSYS Chatbot Arena. In June 2026 it launched Agent Arena, using causal tracing (multi-intervention controlled trials) to rank agent task performance — a methodological step beyond simple preference votes.
MoatRank™ Breakdown
Total Score78 / 100
Structural Integrity16/20
Behavioral Coherence15/20
Governance Maturity14/20
Adoption Legitimacy18/20
Composability Index15/20
Observation Timeline
Jun 4, 2026
Agent Arena launched with causal-tracing methodology
160k+ agent tasks and 2M+ tool calls in its first week; ~969k sessions and 28 models ranked by mid-June 2026.
Certification
✦ L'AURA Certified
Issued: Jun 25, 2026
Most-cited human-preference benchmark; methodologically strongest agent leaderboard.