Solar Pro Models by Upstage
Last refreshed 2026-05-19. Next refresh: weekly.
Details
Capabilities
About
The Upstage Solar Pro LLM, part of the Solar family of AI models, is a compact yet powerful language model designed to excel in fine-tuning tasks across various domains. Built on the Llama 2 architecture, Solar Pro leverages innovative techniques like Depth Up-Scaling (DUS) for improved scalability and performance without adding significant complexity. The model has demonstrated superior fine-tuning capabilities, consistently outperforming comparable open-source models on diverse tasks such as natural language understanding, reasoning, and code generation. Solar Pro integrates seamlessly with platforms like Amazon SageMaker JumpStart, offering pre-configured tools for easy deployment and customization. This integration enables developers to adapt the model for specific use cases, backed by components like Layout Analysis and Groundedness Check, which ensure reliable, contextually accurate outputs. These tools enhance the model’s ability to process and contextualize unstructured data effectively, minimizing risks like hallucination in generated responses.
Decision facts
- Best fit
- JSON / Tool usecodingstructured outputs
- Capability starting point
- Upstage Solar Pro 3 with 200k context and JSON / Tool use
- Lowest tracked input
- Upstage Solar Pro 3 · $0.15/1M · OpenRouter
- Closest related family
- Solar 0
Current Variants
Use-when guidance is based on each model's tracked capabilities, context window, release date, and replacement status.
Use when the workload needs 200k context, 102B parameters, and JSON / Tool use.
| Model | Use when | Released | Signals | Status |
|---|---|---|---|---|
| Upstage Solar Pro 3 | Use when the workload needs 200k context, 102B parameters, and JSON / Tool use. | 2026-01 | 200k context102B parametersJSON / Tool use | Current |
Release Timeline
1 release groupSpecifications(1 models)
| Model | Released | Context | Parameters | JSON / Tool use |
|---|---|---|---|---|
| Upstage Solar Pro 3 | 2026-01 | 200k | 102B | Yes |
Available From(1 provider)
Pricing
| Model | Provider | Input / 1M | Output / 1M | Type |
|---|---|---|---|---|
| Upstage Solar Pro 3 | OpenRouter | $0.15 | $0.6 | Serverless |


