SEOUL, January 06 (AJP) - South Korean artificial intelligence company Upstage said on Tuesday it has released its in-house large language model, Solar Open 100B, as open-source software.
Solar Open is the first output of the Ministry of Science and ICT’s “Independent AI Foundation Model” project, in which Upstage is participating as the lead company. Upstage said it developed the model entirely in-house, overseeing the full process from data construction to training.
The company released the model on the global open-source platform Hugging Face and published a technical report detailing its development.
Upstage said the 102-billion-parameter model delivers performance comparable to global frontier models. It said Solar Open is about 15 percent the size of China’s DeepSeek R1 but outperformed it in key benchmark evaluations across three languages: Korean, English and Japanese.
According to the company, Solar Open recorded performance gains of 110 percent in Korean, 103 percent in English and 106 percent in Japanese compared with DeepSeek R1.
The company said it plans to open part of the dataset through the National Information Society Agency’s AI Hub, describing it as a public resource aimed at strengthening South Korea’s artificial intelligence research ecosystem.
“Solar Open is a model Upstage trained independently from the beginning, and it is the most Korean yet also global AI, with a deep understanding of Korea’s emotions and linguistic context,” Chief Executive Kim Sung-hoon said.
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