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About this paper

Vals AI Team

RSI-Index evaluates AI agents on four bounded tasks related to LLM development, independently scoring submitted artifacts against baselines and references. Its index averages task scores, with 0.5 marking reference parity. Among 19 systems, Claude Opus 5.5 leads at 0.373 and beats the reference only on LM Training; frontier-scale generalization remains untested.

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