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Zhong-Yi Han

4 papers indexed here

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Preprint Sep 2026

A Dominant Supplier Slows Recursive Drift More Than It Steers It

This work retrain eight open models from their base weights on a shared pool of each other's text for five generations, varying the part written by one model, Phi-2, from an equal share to 90%.

Yang-Ze Liu, Zhong-Yi Han · 0 citations
#artificial intelligence Preprint Sep 2026

Useful to Whom? Sample Value Is Defined Only Relative to the Learner

What kind of data does a model need in order to learn? Coreset selection makes this question concrete: under a budget, keep the samples most useful for training. Easy-first and geometric coverage criteria can win in different budget regimes, separated by a crossover boundary. We ask whether this boundary is fixed by th...

Yang-Ze Liu, Xiao-Long Yin, Zhong-Yi Han · 0 citations
#artificial intelligence Preprint Sep 2026

Are Coreset Selection Methods Worth Their Cost?

Coreset selection picks a representative subset of the labeled training set to make training cheaper. However, it is usually evaluated by downstream accuracy at a fixed subset size, ignoring both the time spent selecting the subset and the training recipe behind each reported number. We introduce an end-to-end benchmar...

Yang-Ze Liu, Zhong-Yi Han · 1 citation · ⚡1
#artificial intelligence Preprint Sep 2026

The Oligarch Barely Steers Model Collapse in Multi-Model Ecosystems

AI-generated text is flowing back into the training corpora of the next generation of models. Recursive training on it drives model collapse, and recent work extends the setting to many models feeding one another -- but almost always with the market split evenly, while real generative AI is an oligopoly. Concentration...

Yang-Ze Liu, Zhong-Yi Han · 0 citations

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