AI2 reveals Steering Arena's top 36 entries were all gibberish strings after 600 submissions

allen_ai · x · 2026-09-18

Allen AI (AI2) disclosed a counterintuitive finding from its Steering Arena evaluation: after 600 submissions, all top 36 entries were strings no human would normally write, like "Undert! AH :-) Rog Appl)." — meaning players could score well without producing text meaningful to humans.

AI2 noted that because it releases far more than model weights with OLMo, Padia could inspect what Steering Arena actually rewarded, investigate why nonsense strings scored so highly, and share the underlying measurements — helping the field improve how it evaluates prosocial AI behavior. The episode also exposes how arena-style evals can be gamed with meaningless content.

Related event: Ai2's Steering Arena: Gibberish Prompts Make Olmo 3 Kinder(4 posts)→

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