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Nikita Kozodoi

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#machine learning Preprint Oct 2026

Evolving LLM-Generated Features for Interpretable Classification

Large language models (LLMs) are increasingly used as classifiers, yet they operate as opaque systems whose decisions are difficult to interpret, which complicates their use in regulated domains such as credit scoring or medical diagnosis. We propose an evolutionary framework that iteratively discovers natural language...

Jack Butler, Zainab Afolabi, Nikita Kozodoi · 0 citations
Preprint Aug 2026

Test-Time Augmentation for LLMs: When Input Diversity Beats Output Diversity at Matched Compute

Test-Time Augmentation is studied, finding that TTA is most cost-effective for mid-tier models where a stronger model is unavailable or too expensive, and varying the input converts inference compute into accuracy more efficiently than varying the reasoning path alone.

Nikita Kozodoi, Zainab Afolabi, Jack Butler · 0 citations
Jul 2026

Are we Merging the Right Models? Impact of Expert Training Duration on Model Merging for LLMs

A striking method-dependent pattern is revealed: simple averaging degrades sharply with overfitting, while sparsification-based methods achieve their best performance well past the validation optimum, suggesting that training duration and merging method should be chosen jointly rather than independently.

Nikita Kozodoi, Zainab Afolabi, Jack Butler · 0 citations

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