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Han Xiao

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Jul 2026

Cross-Tokenizer On-Policy Distillation via Byte-Prefix Marginalization

Open-weight language models from different families exhibit complementary capabilities, motivating their consolidation into a compact student through on-policy distillation (OPD). However, full-vocabulary OPD typically assumes a shared tokenizer, while existing cross-tokenizer methods may discard teacher probability ma...

Hao Wang, Kun Yuan, Wenlin Zhong et al. · 5 citations · ⚡1
#machine learning Preprint Sep 2026

TV-Regulated OPD: Direction Matters in On-Policy Distillation

It is found that retaining only the sign of token-level advantages is sufficient to achieve the performance comparable to standard OPD, and a robust TV regulated On-Policy Distillation (TV-OPD) method is proposed, benefiting from the bounded and diminished advantages.

Han Xiao, Yifan Niu, Dong-Yi Liu et al. · 0 citations
#computer vision Preprint Sep 2026

Jina-OCR-v1: Efficient Document Parsing with Speculative Decoding and Dense Verifiable Rewards

Jina-OCR-v1 is presented, an end-to-end document parsing model built to serve on low-budget GPUs that combines the compressed-vision encoder and the 3B mixture-of-experts decoder of DeepSeek-OCR with a FastMTP speculative decoding head that shares a single draft block recursively across K=3 prediction steps.

Alejandro Barón García, Feng Wang, Emília Garcia Casademont et al. · 0 citations
Preprint Aug 2026

omni-macos: On-Device Omni-Modal Search on Apple Silicon

Omni-macos is presented, which runs its encoder, index and store on the Mac that already holds the files, so no indexed file, no typed query and no vector ever leaves the machine.

Han Xiao · 0 citations

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