Doubling Conversation Length Doubles Safety Failure Odds, Arena Finds

arena · x · 2026-10-09

Arena's Alignment Index shows misalignment rates scale with conversation length: doubling length roughly doubles the likelihood of a safety failure. In sessions with 20+ messages, about 1 in 8 contain an Unauthorized Action — meaning risks compound as agents take on longer, higher-stakes tasks.

Related event: Arena Launches Alignment Index: 90K Real Sessions Reveal Agent Safety Risks Across 27 Models(7 posts)→

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