Solar Pro 4
Upstage released 2026-08-10
$0.052 per million tokens, balanced
Nothing is both better and cheaper.
Under a balanced workload, no other model in the catalogue scores higher and costs less. This model is on the value frontier.
Every price dimension
| Input | $0.030/M |
|---|---|
| Output | $0.120/M |
| Cached input | $0.0060/M |
Independent scores
| Intelligence | 41.6 |
|---|---|
| Coding | 52.7 |
| Agentic | 33.6 |
| LMArena Elo | 1376.2default |
Sources are listed separately rather than averaged. Across the 62 models both have scored they correlate at r = 0.806 — close agreement overall, but four models rank very differently between them, and a blended score would hide exactly those.
Capability
| Context window | 524K |
|---|---|
| Max output | 131K |
| Input modes | text |
| Tool use | yes |
| Reasoning | optional |
Provenance
| Price source | openrouter.ai |
|---|---|
| Fetched | 2026-08-24 |
| Quality data | verified |
Solar Pro 4 is Upstage's cost-efficient large language model, featuring a 524K context window. It is built for long-horizon tasks and agentic workflows, with strong capabilities in office productivity, document-intensive...