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EvoMerge: Neuroevolution for Large Language Models (arxiv.org)
3 points by PaulHoule on Feb 11, 2024 | hide | past | pdf | 1 comment on HN

In plain words: EvoMerge treats model improvement like evolution: blending two trained models mixes their strengths, while extra fine-tuning makes small tweaks. Unlike plain fine-tuning, which can sharpen one skill while dulling others, it aims to raise reasoning without losing general ability.

Abstract

Extensive fine-tuning on Large Language Models does not always yield better results. Oftentimes, models tend to get better at imitating one form of data without gaining greater reasoning ability and may even end up losing some intelligence. Here I introduce EvoMerge, a systematic approach to large language model training and merging. Leveraging model merging for weight crossover and fine-tuning for weight mutation, EvoMerge establishes an evolutionary process aimed at pushing models beyond the limits of conventional fine-tuning.

Yushu Jiang
arXiv:2402.00070 · cs.NE, cs.AI, cs.CL, cs.LG · submitted Jan 30, 2024
abstract · pdf · html · The current submission is the first draft, published for the sole purpose of sharing an idea and encouraging community effort. A more consolidated version may come later

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The rationale here doesn't seem very compelling. In exchange for being so inefficient, evolutionary methods are good at some things, like non-differentiable losses (eg. novelty search where 'new' would be hard to define in any kind of differentiable way) or highly rugged deceptive fitness landscapes etc. But these are just LLMs on ordinary benchmarks?