Solar Pro 3
Solar Pro 3 is Upstage’s hosted enterprise language model focused on reasoning, instruction following, and Korean and English workflows. Its 102B sparse architecture activates 12B parameters. The January launch established public API access; a March update strengthened agentic tasks through SnapPO reinforcement learning while preserving the service interface. The two documented snapshots are grouped under this model identity. API and partner access support enterprise assistants, but the Pro checkpoint is not a public weight release.
2026-01-26
102B total, 12B active
Mixture of Experts
Proprietary
Specifications
- Parameters
- 102B total, 12B active
- Architecture
- Mixture of Experts
- License
- Proprietary
- Type
- text
- Modalities
- text
Benchmark Scores
Advanced Specifications
- Model Family
- Solar
- API Access
- Available
- Chat Interface
- Available
- Multilingual Support
- Yes
- Variants
- solar-pro3-260127solar-pro3-260323
Capabilities & Limitations
- Capabilities
- reasoningtool usemultilingual generation
- Known Limitations
- Public weights are unavailableScores vary between January and March snapshotsAgent execution requires a harness
- Notable Use Cases
- Korean enterprise assistantsoffice workflowshosted agents