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Koala: An Index for Quantifying Overlaps with Pre-training Corpora

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arxiv 2303.14770 v1 pith:HB56OC7W submitted 2023-03-26 cs.CL cs.LG

classification cs.CLcs.LG
keywords pre-trainingkoalacorporaindexlargepublicanalysisdata
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In very recent years more attention has been placed on probing the role of pre-training data in Large Language Models (LLMs) downstream behaviour. Despite the importance, there is no public tool that supports such analysis of pre-training corpora at large scale. To help research in this space, we launch Koala, a searchable index over large pre-training corpora using compressed suffix arrays with highly efficient compression rate and search support. In its first release we index the public proportion of OPT 175B pre-training data. Koala provides a framework to do forensic analysis on the current and future benchmarks as well as to assess the degree of memorization in the output from the LLMs. Koala is available for public use at https://koala-index.erc.monash.edu/.

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Cited by 2 Pith papers

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  1. ProDS: Preference-oriented Data Selection for Instruction Tuning

    cs.LG 2025-05 conditional novelty 6.0 of 10

    ProDS picks instruction-tuning data by matching training-sample gradients to preference gradients from DPO, achieving slight gains over prior selection methods on MMLU, TYDIQA, BBH, and Alpaca-style tests.

  2. RICo: Refined In-Context Contribution for Automatic Instruction-Tuning Data Selection

    cs.CL 2025-05 conditional novelty 6.0 of 10

    RICo scores instruction examples by their in-context perplexity effect on an assessment set, then trains a lightweight selector to pick top-scoring data, achieving better benchmark results from 5% to 15% of the original data.

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