Upstage: Solar Pro 4
Solar Pro 4 is a large language model from Upstage. It is suited for agentic workflows, office productivity, document-intensive work, and coding.
Specifications
| Attribute | Value |
|---|---|
| Lab | Upstage |
| Tags | Intelligent Coding Agentic |
| Release Date | 2026-08 |
| Context Window | 524,288 tokens |
| Input Price / 1M | $0.03 |
| Output Price / 1M | $0.12 |
| Input Modalities | Text |
| Output Modalities | Text |
Strengths
- 512K-token context window for long documents
- Low input pricing for cost-sensitive production workloads
- Tool-use support for agentic workflows
- Structured output support for reliable application integration
Weaknesses
- Newer listing with limited independent benchmark coverage
- Text-only inputs limit multimodal application coverage
Best For
- Agentic workflows and tool-using applications
- Long-context document and codebase processing
In Depth: Solar Pro 4
Summary
Solar Pro 4 is an AI model from Upstage.
Released 2026-08. It supports Text input and produces Text output, with a context window of 524,288 tokens. Input pricing is $0.03 per 1M tokens and output is $0.12 per 1M tokens on OpenRouter.