# Solar Pro 3: AI model fact sheet

- **Provider:** upstage
- **Released:** 2026-01-27
- **Context window:** 128,000 tokens
- **API pricing:** $0.000 / 1M input, $0.000 / 1M output
- **OpenRouter ID:** upstage/solar-pro-3:free
- **Capabilities:** conversation, reasoning, code-generation, analysis

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. Note: Deprecating March 2, 2026.

Source: real side-by-side outputs, pricing and specs at https://rival.tips/models/solar-pro-3-free