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Upstage

Upstage: Solar Mini 4

upstage/solar-mini4

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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 speed and cost matter, with fluent Korean alongside strong English and Japanese, and support for long-context workloads. When using BYOK with ZDR enforcement, the Console API key must belong to a ZDR-enabled Upstage organization. Contact Upstage to enable ZDR on your org.

Input
$0.05

/ 1M tokens

Output
$0.2

/ 1M tokens

Context window
524.29K

tokens

Limits

Context

524,288

tokens

Max output

131,072

25% of the context window

Model facts

Author

Upstage

Tokenizer

Other

Modality

Text -> Text

Created

Sep 23, 2026

Reasoning

Default MediumMaxXhighHighMediumLowMinimalNone

Publication status

Hugging Face: not mappedLicense: not publishedParameter count: not published

Modalities

Input · TextOutput · Text

Generation controls

Frequency penaltyInclude reasoningMax tokensParallel tool callsPresence penaltyReasoningReasoning effortResponse formatStructured outputsTemperatureTool choiceToolsTop p

Capability scores

24.1
Intelligence index

Better than 58% of models compared

Creative tasks

Category performance

Websites
Top 68%

1159 Elo

33.2% win

Code
Top 65%

1158 Elo

32.7% win

Games
Top 63%

1140 Elo

31.4% win