Upstage's flagship model, specialized for agentic use
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...
Context
524K
524,288 tokens
Max output
131K
131,072 tokens
Input
$0.30
per 1M tokens
Output
$1.20
per 1M tokens
Providers
5
6 listings
Intelligence
28.2
Intelligence Index
Pricing
USD per 1M tokens · listed by Upstage
| Token type | Standard |
|---|---|
| Input | $0.30 |
| Output | $1.20 |
| Cache read | $0.06 |
Lowest input price across providers: $0.03.
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
- Intelligence28.2#59 of 208
- Coding52.7#49 of 112
- AgenticNot scored—
- Arena1,161#63 of 128
Rankings
Position on each OneAtlas leaderboard
Providers · 5
6 listings
| Provider | Model ID | Context | Input limit | Output | Input $ | Output $ | Reasoning $ | Cache read | Cache write | Audio in | Audio out | Reasoning | Tools | Structured | Temp. | Updated |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 AI/ML API | upstage/solar-pro4 | 524K | — | 131K | $0.03 | $0.13 | — | $0.0063 | — | — | — | Yes | Yes | Yes | Yes | Aug 6, 2026 |
 Kilo Gateway | upstage/solar-pro4 | 524K | — | 131K | $0.30 | $1.20 | — | $0.06 | — | — | — | Yes | Yes | Yes | Yes | Aug 6, 2026 |
 LLMTR | upstage/solar-pro4 | 524K | — | 131K | $0.15 | $0.60 | — | $0.03 | — | — | — | Yes | Yes | Yes | Yes | Aug 6, 2026 |
 NanoGPT | upstage/solar-pro4:thinking | 524K | 524K | 131K | $0.03 | $0.12 | — | $0.006 | — | — | — | Yes | Yes | Yes | Yes | Aug 6, 2026 |
| NanoGPT | upstage/solar-pro4 | 524K | 524K | 131K | $0.03 | $0.12 | — | $0.006 | — | — | — | No | Yes | Yes | Yes | Aug 6, 2026 |
| Upstage | solar-pro4 | 524K | — | 131K | $0.30 | $1.20 | — | $0.06 | — | — | — | Yes | Yes | Yes | Yes | Aug 6, 2026 |