Upstage's compact, cost-efficient model for agentic use
Solar Mini 4 is Upstage's compact, cost-efficient language model, a 35B-parameter mixture-of-experts with 3B active parameters and a 524K context window. It is built for agentic use cases where response...
Context
524K
524,288 tokens
Max output
131K
131,072 tokens
Input
$0.10
per 1M tokens
Output
$0.40
per 1M tokens
Providers
3
4 listings
Intelligence
24.1
Intelligence Index
Pricing
USD per 1M tokens · listed by Upstage
| Token type | Standard |
|---|---|
| Input | $0.10 |
| Output | $0.40 |
| Cache read | $0.01 |
Lowest input price across providers: $0.05.
Capabilities
ReasoningYes
Effort: none, minimal, low, medium, high, xhigh, max
Tool callYes
Structured outputYes
TemperatureYes
AttachmentsNo
Interleaved reasoningNo
Open weightsNo
ModeratedNo
Input
Text
Output
Text
Benchmarks
Published scores and Design Arena Elo
- Intelligence24.1#79 of 208
- CodingNot scored—
- AgenticNot scored—
- Arena1,118#86 of 128
| Design Arena category | Elo | Win rate | Arena rank |
|---|---|---|---|
| Website | 1,154 | 33.0% | #92 |
| Code | 1,140 | 30.7% | #95 |
| Game dev | 1,125 | 29.4% | #91 |
| UI component | 1,088 | 26.5% | #101 |
| 3D | 1,081 | 21.7% | #94 |
Rankings
Position on each OneAtlas leaderboard
Providers · 3
4 listings
| Provider | Model ID | Context | Input limit | Output | Input $ | Output $ | Reasoning $ | Cache read | Cache write | Audio in | Audio out | Reasoning | Tools | Structured | Temp. | Updated |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 Kilo Gateway | upstage/solar-mini4 | 524K | — | 131K | $0.10 | $0.40 | — | $0.01 | — | — | — | Yes | Yes | Yes | Yes | Sep 22, 2026 |
 NanoGPT | upstage/solar-mini4 | 524K | 524K | 131K | $0.05 | $0.20 | — | $0.005 | — | — | — | No | Yes | Yes | Yes | Sep 22, 2026 |
| NanoGPT | upstage/solar-mini4:thinking | 524K | 524K | 131K | $0.05 | $0.20 | — | $0.005 | — | — | — | Yes | Yes | Yes | Yes | Sep 22, 2026 |
| Upstage | solar-mini4 | 524K | — | 131K | $0.10 | $0.40 | — | $0.01 | — | — | — | Yes | Yes | Yes | Yes | Sep 22, 2026 |