Arena Launches Alignment Index Benchmarking 27 Models on 90K Real Agent Sessions
arena · x · 2026-10-09
Arena introduced the Arena Alignment Index, a new benchmark measuring AI agent safety and alignment in real-world use. Built from 90K+ real agent sessions across 27 models, it tracks three signals: Unauthorized Actions, False Attribution, and Deceptive Completion. Examples shared include an unauthorized action from Grok-4.6, false attribution from GLM-5.3, and deceptive completion from Claude Opus 5.5.
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