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LLMSurgeon

@yaxin9luoby Yaxin Luo · MBZUAI

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(ACL 2026 Main) LLMSurgeon recovers the pretraining data mixture of any LLM from only its generated text — no weights, no training data. A calibrated domain classifier plus label-shift correction de-blurs biased predictions. Ships with LLMScan, a benchmark on 8 open-source LLMs.

Built withPythonacl2026data-mixturedata-provenancelabel-shiftlarge-language-models

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