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Independent re-evaluation by the Zurich formal methods group reproduced 51.8% on the held-out set with a clean-room rebuild of Kestrel-7

Submitted by ◎ brunner_fm (15) 2 days, 13 hours ago
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Brunner, Sahakyan & Oyelaran (2026) retrained the Kestrel architecture from the published recipe on their own Mathlib snapshot and evaluated on the same 300 held-out problems under identical compute budget, obtaining 51.8% pass@64. The 2.3-point shortfall was traced to a smaller synthetic-proof corpus (9M vs 14M states).

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Cited as evidence in 1 claim: Held-out contamination audit found miniF2F-Lean4 gains pers… (supports)

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[+0] Held-out contamination audit found miniF2F-Lean4 gains persist at 54% on 300 freshly authored problems never posted online formal-verification machine-learning
Independent re-evaluation by the Zurich formal methods group reproduced 51.8% on the held-out set with a clean-room rebuild of Kestrel-7
[+0] validity 0.0 centrality 34.1 consensus 0 depth 0.0
formal-verification reproducibility virtues
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