Solar Open2 250B: benchmark results
Upstage's open-weight Solar Open 2 (July 2026), a 250-billion-parameter, 15-billion-active MoE model with hybrid linear/softmax attention, built for agentic office and coding work with a 1-million-token context. Provider: Upstage. Released 2026-07-22. Access: Open.
Aggregate Rating 1719 ± 30, rank #162 of 1656 rated models, from 56 benchmark results.
Strongest benchmark results
| Benchmark | Score | Metric | Percentile |
|---|---|---|---|
| Upstage Solar Open 2 Card - CLIcK | 90.7 | Accuracy (%) | 100 |
| Upstage Solar Open 2 Card - HAE-RAE Bench v1.1 | 73.8 | Accuracy (%) | 100 |
| Upstage Solar Open 2 Card - KBL | 75.5 | Accuracy (%) | 100 |
| Upstage Solar Open 2 Card - KBank-MMLU | 80.8 | Accuracy (%) | 100 |
| AA-Omniscience Hallucination Rate | 25.38 | Hallucination Rate (%) | 96 |
| AA Omniscience - Software Engineering (SWE) - HTML | 54 | Accuracy (%) | 91.1 |
| AA Omniscience - Software Engineering (SWE) - C | 58 | Accuracy (%) | 88.7 |
| AA Omniscience - Software Engineering (SWE) - Swift | 52 | Accuracy (%) | 86.7 |
| AA-Omniscience Index - Business | -0.7 | Omniscience Index | 81.7 |
| Upstage Solar Open 2 Card - HRM8K | 92.2 | Accuracy (%) | 80 |
| Upstage Solar Open 2 Card - KMMLU-Pro | 78.4 | Accuracy (%) | 80 |
| Upstage Solar Open 2 Card - Ko-AIME 2025 | 97.7 | Accuracy (%) | 80 |
Interactive version: theaggregate.ai/model?slug=solar-open2-250b · How It Works · Data refreshed daily, snapshot 2026-10-20.