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20242026
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cs.CL2026

Short Data, Long Context: Distilling Positional Knowledge in Transformers

Patrick Huber, Ernie Chang, Chinnadhurai Sankar +4

Extending the context window of language models typically requires expensive long-context pre-training, posing significant challenges for both training efficiency and data collecti…

cs.CL2026

MobileLLM-R1: Exploring the Limits of Sub-Billion Language Model Reasoners with Open Training Recipes

Changsheng Zhao, Ernie Chang, Zechun Liu +8

The paradigm shift in large language models (LLMs) from instinctive responses to chain-of-thought (CoT) reasoning has fueled two prevailing assumptions: (1) reasoning capabilities…

cs.CL2026

AutoMixer: Checkpoint Artifacts as Automatic Data Mixers

Ernie Chang, Yang Li, Patrick Huber +4

In language model training, it is desirable to equip models with capabilities from various tasks. However, it is not clear how to directly obtain the right data mixtures for these…

cs.CL2025

Self-Vocabularizing Training for Neural Machine Translation

Pin-Jie Lin, Ernie Chang, Yangyang Shi +1

Past vocabulary learning techniques identify relevant vocabulary before training, relying on statistical and entropy-based assumptions that largely neglect the role of model traini…

cs.CL2024

Scaling Parameter-Constrained Language Models with Quality Data

Ernie Chang, Matteo Paltenghi, Yang Li +7

Scaling laws in language modeling traditionally quantify training loss as a function of dataset size and model parameters, providing compute-optimal estimates but often neglecting…

cs.CL2024

Target-Aware Language Modeling via Granular Data Sampling

Ernie Chang, Pin-Jie Lin, Yang Li +6

Language model pretraining generally targets a broad range of use cases and incorporates data from diverse sources. However, there are instances where we desire a model that excels…