Upstage: Solar Pro 3 (free)
Upstage Solar Pro 3 is available free with tool use and a 128K context window, but without published benchmark data it's difficult to assess its real-world capability — making it suitable only for exploratory or low-stakes use cases.
Assessment date: March 5, 2026
Our methodology takes into account a range of factors including pricing, functionality, capabilities, benchmark performance, and real-world applicability. Rankings are reviewed and updated regularly as new models are released. Issues with our rankings? Contact us
Solar Pro 3 is Upstage's powerful Mixture-of-Experts (MoE) language model. With 102B total parameters and 12B active parameters per forward pass, it delivers exceptional performance while maintaining computational efficiency. Optimized for Korean with English and Japanese support.
Capabilities
Architecture
| Modality | Text → Text |
| Tokenizer | Other |
