upstage/solar-pro-3Solar Pro 3 is Upstage’s proprietary AI model, released Jan 27, 2026. It costs $0.15/M input and $0.60/M output tokens, and handles a 131K-token context window.
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.
Scores on standardized evaluations. Higher is better — and rank shows where Solar Pro 3 lands among all models tracked on Model Beat.
Graduate-level scientific reasoning
Frontier of human expert knowledge
Scientific research coding
Tool-agent-user reliability
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.
Solar Pro 3 is an AI model developed by Upstage, released Jan 27, 2026.
Solar Pro 3's list price from Upstage is $0.15 per million input tokens and $0.60 per million output tokens.
Solar Pro 3 supports a context window of up to 131K tokens.
On standardized evaluations tracked by Epoch AI, Solar Pro 3 scores 86.3% on τ²-bench, 10.3% on Humanity's Last Exam, 72.4% on GPQA Diamond.
Solar Pro 3 is a proprietary model (API access), available through its provider's API rather than as a downloadable open-weight model.
Benchmark data from Epoch AI (CC BY) and Artificial Analysis; pricing, specs & descriptions from OpenRouter. Data updated Sep 10, 2026.