Solar Pro 4

Closed Source

Closed Weights

Parameters

Undisclosed

Context Length

524K

Modality

Text

Architecture

Undisclosed

License

Proprietary

Release Date

10 Aug 2026

Knowledge Cutoff

API Pricing (per 1M)

Input: $0.09 · Output: $0.36

Evaluation Benchmarks

Rank

#99

Benchmark	Score	Rank
Professional Knowledge MMLU Pro	0.863	7
Graduate-Level QA GPQA	0.89	28
Agentic Index Artificial Analysis	0.34	55
Agent Arena Agent Arena	-16.98	63
Coding Index Artificial Analysis	0.53	81
Web Development WebDev Arena	1371	85
Intelligence Index Artificial Analysis	0.28	112
General Text Text Arena	1386	127

Rankings

Overall Rank

#99

Coding Rank

#111

About Solar Pro 4

Solar Pro 4 is a cost-efficient large language model from Upstage featuring a 524K token context window. It is built for long-horizon enterprise tasks, agentic workflows, and document-intensive operations.

Technical Specifications

Architecture specifications are undisclosed for proprietary models.

About Solar

The Solar model family developed by Upstage.

Other Solar Models

Solar Mini 4