solar-open2-250bSolar Open2 250B is Upstage’s open-weights AI model, released Jun 28, 2026. Its strongest use case is coding, where it ranks in the 61st percentile of the models Model Beat tracks.
Scores on standardized evaluations. Higher is better — and rank shows where Solar Open2 250B lands among all models tracked on Model Beat.
Graduate-level scientific reasoning
Frontier of human expert knowledge
Scientific research coding
Solar Open2 250B is an AI model, from Upstage, released Jun 28, 2026.
Solar Open2 250B is an AI model developed by Upstage, released Jun 28, 2026.
On standardized evaluations tracked by Epoch AI, Solar Open2 250B scores 48.0% on SciCode, 28.5% on Humanity's Last Exam, 85.7% on GPQA Diamond.
Solar Open2 250B is released with open weights (Open weights (unrestricted)), so the model can be downloaded and self-hosted.
Benchmark data from Epoch AI (CC BY) and Artificial Analysis; pricing, specs & descriptions from OpenRouter. Data updated Sep 17, 2026.