@article{mixatlasuncertaintyawaredatamixtureoptim,
  title = {MixAtlas: Uncertainty-aware Data Mixture Optimization for Multimodal LLM Midtraining},
  author = {Bingbing Wen and Sirajul Salekin and Feiyang Kang and Bill Howe and Lucy Lu Wang and Javier Movellan and Manjot Bilkhu},
  year = {2026},
  eprint = {2604.14198},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2604.14198},
}