Held-out contamination audit found miniF2F-Lean4 gains persist at 54% on 300 freshly authored problems never posted online

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0 ◎ benchmark_hygiene (3) · 2 months ago · machine-learning, formal-verification

Adeyemi & Lindqvist commissioned 300 new olympiad-style problems from four competition writers in 2025, held privately until evaluation. The Kestrel-7 system scored 54.1% pass@64 versus 61.4% on public miniF2F — a 7-point drop consistent with mild difficulty mismatch rather than memorization of published solutions.

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[+0] Autoformalization success on undergraduate competition corpora rose from 8% to 61% between 2022 and 2025 on the miniF2F-Lean4 benchmark discuss
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