Solar Open 100B
Upstage · 2025-12-31 · 102.7B parameters
Solar Open 100B is Upstage's open-weight flagship, a Mixture-of-Experts model with 102.65B total parameters and roughly 12B active per token. Its pretraining used 19.7 trillion tokens before subsequent mid-training and reinforcement-learning stages. Released on December 31, 2025 under Upstage's Solar license with a 128K-token context window, it targets reasoning, instruction following, and agentic tasks.