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Solar
Upstage's Solar models — Korean-built enterprise and document-focused language models.
Model Facts
Latest model: Solar Pro 4
- Provider
- Upstage
- Released
- Aug 6, 2026
Benchmarks
Full Model List
| Model | Released | Status | Note |
|---|---|---|---|
| Solar Pro 4 | Aug 6, 2026 | current | Intelligence Index 42, $0.30 / $1.20 per million tokens |
| Solar Pro 3 | Apr 6, 2026 | legacy | Intelligence Index 14 |
- Official model page:
- upstage.ai
- Official documentation:
- console.upstage.ai/docs
- Other sources:
- Solar Pro 4 release (OrcaRouter)
- Solar Pro 3 vs Pro 4 (LLMBase)
What it is
Solar is Upstage's model line. Solar Pro 4 (August 6, 2026) scores 42 on the Artificial Analysis Intelligence Index, up from 14 for Solar Pro 3 (April 6, 2026), at $0.30 per million input tokens and $1.20 per million output tokens. Upstage focuses on enterprise and document-heavy use cases.
Where this information comes from
Details come from price and benchmark trackers. Weight availability and context window were not confirmed, so neither is shown. Release dates, context windows and benchmark scores are vendor-reported unless stated, and harnesses differ between labs, so treat the numbers as indicative.
Notable traits
- Large generational jump from Pro 3 to Pro 4.
- Low API prices.
- Document and enterprise orientation.