{"id":"2605.09932","title":"FocuSFT: Bilevel Optimization for Dilution-Aware Long-Context Fine-Tuning","url":"https://codeofpaper.com/paper/2605.09932","arxiv_url":"https://arxiv.org/abs/2605.09932","published":"2026-05-11","code":"none","best":null,"most_starred_community":null,"implementations":[],"possible_matches":0}