Upstage: Solar Mini 4
Solar Mini 4 is Upstage's compact, cost-efficient language model, a 35B-parameter mixture-of-experts with 3B active parameters and a 524K context window. It is built for agentic use cases where response... 35B MoE model with 3B active parameters 524K context window Low token pricing for agentic workloads Smaller active capacity than frontier models Limited independent benchmark coverage at launch Cost-sensitive agent workflows Long-context coding and document tasks High-volume text generation
Specifications
| Lab | Upstage |
|---|---|
| Context window | 524,288 |
| Input price | $0.05/1M |
| Output price | $0.20/1M |
| Release | 2026-09-01 00:00:00 |
Strengths
- 35B MoE model with 3B active parameters
- 524K context window
- Low token pricing for agentic workloads
Weaknesses
- Smaller active capacity than frontier models
- Limited independent benchmark coverage at launch
Best for
- Cost-sensitive agent workflows
- Long-context coding and document tasks
- High-volume text generation
In Depth: Solar Mini 4
Summary
Solar Mini 4 is an AI model from Upstage.
Released 2026-09-01 00:00:00. It supports Text input and produces Text output, with a context window of 524.3K tokens. Input pricing is $0.05 per 1M tokens and output is $0.20 per 1M tokens on OpenRouter.