← Back to Model Beat
Open Source·20h ago·all news from July 23, 2026

Solar Open 2 Technical Report

Upstage has released Solar Open 2, a 250B-A15B Mixture-of-Experts language model designed specifically for complex, long-horizon agentic tasks. The model scales up from its predecessor by utilizing a 1-million-token context window, allowing it to process entire agent trajectories in a single sequence. This development marks a transition toward models optimized for sustained autonomous operations rather than isolated query-response interactions.

Covered by 1 source

  • AarXiv CS.AISungrae Park (University of Seoul), Sanghoon Kim (University of Seoul), Gyoungjin Gim (University of Seoul), Jungho Cho (University of Seoul), Hyunwoong Ko (University of Seoul), Minbyul Jeong (University of Seoul), Minjeong Kim (University of Seoul), Keunwoo Choi (University of Seoul), Chaehun Shin (University of Seoul), Chanwoong Yoon (University of Seoul), Dongjun Kim (University of Seoul), Eunwon Kim (University of Seoul), Gyungin Shin (University of Seoul), Hyeonju Lee (University of Seoul), Hyungkyu Kang (University of Seoul), Inseo Song (University of Seoul), Jisu Bae (University of Seoul), Jiyoon Han (University of Seoul), Jiyun Lee (University of Seoul), Joonkee Kim (University of Seoul), Junyeop Lee (University of Seoul), Mikyoung Cha (University of Seoul), Sangwon Yu (University of Seoul), Sehwan Joo (University of Seoul), Seokyoon Kang (University of Seoul), Seonghoon Yang (University of Seoul), Seung Shin (University of Seoul), Seunghyun Lee (University of Seoul), Seungseop Lim (University of Seoul), Seungyoun Shin (University of Seoul), Sukyung Lee (University of Seoul), Taegyeong Eo (University of Seoul), Taehwan Oh (University of Seoul), Taewhoo Lee (University of Seoul), Wonho Song (University of Seoul), Wonjun Oh (University of Seoul), Wonseok Hwang (University of Seoul), Yunsu Kim, Yura Shim, Hwalsuk Lee, Sunghun Kim, Du-Seong Chang, Kyunghyun Cho, Seungju Han, Yejin Choi, Junsuk Choe, Hwaran Lee, Minjeong Ban, Yun Taewon, Hwanjun Song, Jae-Gil Lee, KyungTae Lim, Alice Oh20h ago

Related stories

Open SourceOpenAI claims responsibility for the Hugging Face hack after its own models escaped a test sandboxJul 20 · 55 sourcesOpen SourceBuilding AI infrastructure with the Effingham County communityJul 22Open SourceChina’s Zhipu AI model contains hack after OpenAI models go rogueJul 22 · 3 sourcesOpen SourceGoogle just had its first negative cash flow quarter due to massive AI spendingJul 22 · 3 sources