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Solar Pro 2

Upstage · 2025-07-10

Solar Pro 2 is Upstage's roughly 31B-parameter frontier-class language model released in July 2025, offering a fast standard chat mode and an advanced reasoning mode for multi-step problem solving. It is built for agentic workflows with native tool use and strong multilingual ability (notably Korean, English, and Japanese), designed to compete with substantially larger models while running efficiently.

Benchmark scores

BenchmarkScore
AA-LCR0.0
AA-LCR v1.10.0
AA-Omniscience Index-55.9
AIME 2025 (Artificial Analysis avg@10)61.3
Artificial Analysis Omniscience Accuracy19.9
Artificial Analysis Omniscience Hallucination Rate93.0
Artificial Analysis Openness Index11.1
Artificial Analysis Progress Index v1199
Capability132.2
CritPt (avg@5)0.0
Global MMLU Lite79.6
GPQA Diamond (Artificial Analysis avg@5)68.7
Humanity's Last Exam (Text-Only)7.4
IFBench (Artificial Analysis avg@5)37.1
LiveCodeBench (Artificial Analysis)61.6
MATH-500 (Artificial Analysis source)96.7
MMLU Pro80.5
SciCode (Artificial Analysis avg@3)30.2
Terminal-Bench Hard4.5
τ²-bench (Telecom)31.9
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