Frontier models flunk 1,000-variant DNA classification: refusals, token blowouts, encrypted reasoning

_lewtun · x · 2026-11-03

While building FineDNA's SFT and RL subsets, Lewis Tunstall tested three frontier models on classifying 1,000 genetic variants as harmless or harmful. GPT-6.1 Sol answered with bare labels (reasoning encrypted), Gemini 4 Argon refused over 50% of the time, and Opus 5.5 ran out of tokens on 20% of prompts. Open-weight models were barely better than random — almost nothing to distill.

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