Solar Mini Models by Upstage
Last refreshed 2026-10-29. Next refresh: weekly.
Details
Capabilities
About
The Solar Mini family of large language models (LLMs) by Upstage AI strikes a balance between power and compactness, enabling them to perform efficiently across various applications. Known for their strong performance in fine-tuning, these models often outshine larger counterparts in specific tasks. Available through platforms like Hugging Face and Amazon SageMaker JumpStart, the Solar Mini models are versatile, supporting functions such as chat, translation, and embeddings. With a focus on purpose-training and leveraging proprietary Depth-Up Scaling (DUS) methods, they are adaptable to a range of domains. Notably, the Solar Mini Chat model excels at multi-turn conversations, especially in Korean. However, some evaluations suggest that despite these strengths, the overall quality of the Solar Mini line is comparatively average within the LLM landscape.
Decision facts
- Best fit
- reasoningJSON / Tool usestructured outputs
- Capability starting point
- Solar Mini 4 with 512K context and reasoning, JSON / Tool use, and structured outputs
- Lowest tracked input
- Solar Mini 4 · $0.050/1M · OpenRouter
- Closest related family
- Agents-A1
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 512K context, reasoning, and JSON / Tool use.
Use when the workload needs 4K context, 10.7B parameters, and structured outputs.
Use when the workload needs 4K context and 10.7B parameters.
| Model | Use when | Released | Signals | Status |
|---|---|---|---|---|
| Solar Mini 4 | Use when the workload needs 512K context, reasoning, and JSON / Tool use. | 2026-09 | 512K contextreasoningJSON / Tool use | Current |
| SOLAR 10.7B | Use when the workload needs 4K context, 10.7B parameters, and structured outputs. | 2024-06 | 4K context10.7B parametersstructured outputs | Current |
| SOLAR 10.7B Japanese | Use when the workload needs 4K context and 10.7B parameters. | 2024-06 | 4K context10.7B parameters | Current |
Release Timeline
2 release groupsSpecifications(3 models)
| Model | Released | Context | Parameters | Reasoning | JSON / Tool use | Structured Outputs |
|---|---|---|---|---|---|---|
| Solar Mini 4 | 2026-09 | 512K | 35B (3B active) | Yes | Yes | Yes |
| SOLAR 10.7B | 2024-06 | 4K | 10.7B | No | No | Yes |
| SOLAR 10.7B Japanese | 2024-06 | 4K | 10.7B | No | No | No |
Available From(7 providers)
Pricing
| Model | Provider | Input / 1M | Output / 1M | Type |
|---|---|---|---|---|
| Solar Mini 4 | OpenRouter | $0.05 | $0.2 | Serverless |
| Solar Mini 4 | Upstage | $0.1 | $0.4 | Serverless |
| SOLAR 10.7B | Upstage Console | $0.15 | $0.6 | Serverless |
| SOLAR 10.7B | Fireworks AI | $0.2 | $0.2 | Serverless |
| SOLAR 10.7B | Together AI | $0.3 | $0.3 | Serverless |
| SOLAR 10.7B Japanese | Upstage Console | $0.3 | $0.3 | Serverless |
| SOLAR 10.7B | Microsoft Foundry | $0.52 | $0.67 | Provisioned |