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.
Everything else
| Max output | 131K |
|---|---|
| Input / 1M | $0.03 |
| Output / 1M | $0.12 |
| Cache read / 1M | $0.006 |
| Cache write / 1M | — |
| 1M in + 1M out | $0.15 |
| Takes | text |
| Returns | text |
| Tools | yes |
| Reasoning | optional |
| Open weights | no |
| Released | 2026-08-10 |
| Knowledge cutoff | — |
| Retires | — |
| Catalog id | upstage/solar-pro4 |
Using it
In 00, this model is picked per agent — and per tier, so the model that answers your customers need not be the one that writes your code. Get 00.