Solar Mini 4
Solar Mini 4 is Upstage’s compact agent model for high-volume retrieval, structured generation, and tool-driven workflows. Its mixture-of-experts architecture has 35B total parameters and 3B active per token, with a 512K context and up to 128K output tokens. It supports parallel function calling and is offered through Upstage’s hosted API, with on-premises deployment options. The model emphasizes compute efficiency for repetitive work while retaining long-context reasoning. On-premises availability does not imply publicly downloadable weights; memory requirements still reflect the full 35B parameters.
2026-10-01
35B total, 3B active
Mixture of Experts
Proprietary
Specifications
- Parameters
- 35B total, 3B active
- Architecture
- Mixture of Experts
- License
- Proprietary
- Context Window
- 524,288 tokens
- Max Output
- 131,072 tokens
- Type
- text
- Modalities
- text
Benchmark Scores
Advanced Specifications
- Model Family
- Solar
- API Access
- Available
- Chat Interface
- Available
Capabilities & Limitations
- Capabilities
- reasoningtool usestructured outputlong context
- Known Limitations
- Public weights are not offeredTool execution and retrieval require external systemsGenerated results require validation
- Notable Use Cases
- enterprise agentsdocument synthesishigh-volume automation
- Function Calling Support
- Yes
- Tool Use Support
- Yes
