Solar Pro 4
Solar Pro 4UpstageProprietaryReasoningReleased Aug 11, 2026Input: text
Overall score
—
Not enough evidence to rank yet
Context window
512K
512,000 tokens
Price per 1M tokens
$0.30 in · $1.20 out
Source: BenchLM
Blended price
$0.53
3:1 input:output tokens
Output speed
—
Not measured yet
Benchmark results (10)
As reported in system cards, papers and public evaluations. Position compares this model with every other model reporting the same benchmark.
Agentic & tool use
| Terminal-Bench 2.1 | 57.0 | #53 of 68 |
| BrowseComp | 49.2 | #46 of 50 |
| MCP Atlas | 61.4 | #29 of 42 |
| APEX-Agents | 18.7 | #7 of 8 |
Coding
| SWE-bench Verified | 70.6 | #60 of 98 |
| LiveCodeBench | 87.8 | #1 of 10 |
Multimodal
| Design Arena Website | 1177 | #66 of 91 |
Knowledge
| MMLU-Pro | 86.3 | #11 of 67 |
Math
| AIME26 | 95.3 | #11 of 29 |
Pricing by source
USD per 1M tokens.
| Source | Input | Output | Cached in |
|---|---|---|---|
| List price (BenchLM) | $0.30 | $1.20 | $0.060 |
| OpenRouter upstage/solar-pro4 | $0.15 | $0.60 | $0.030 |
Upstage’s Solar Pro 4 launch post lists $0.30 input, $0.06 cached input, and $1.20 output per million tokens on the Upstage Console API, with a 90% launch discount through September 10, 2026 and a 70% promotion through October 10, 2026 that BenchLM does not store as the list price.
Arena ratings
Human-preference ratings from LMArena. Best-rated variant shown.
| Text | 1387 | #169 · 21.3K votes |
| WebDev (coding) | 1371 | #109 · 4.7K votes |
Speed
Measured by us through OpenRouter (median of trials).
Not measured yet.