Model Comparison
Solar Open2 250B
vs. Solar Pro 2 (Preview) (Reasoning)
Comparing 2 AI models · 8 benchmarks · Upstage
Recommended Pick
UpSolar Open2 250B5 metric winsStrongest on: Reasoning, Intelligence, GPQA
Lowest Price
Solar Open2 250B
$0.00/1M input price
Best Reasoning
Solar Open2 250B
50.5 reasoning score
Blends available reasoning benchmarks
Best for Coding
Solar Open2 250B
44.7 coding index
Composite Indices
Higher is better; speed and price are normalized
Standard Benchmarks
Only benchmarks with data are shown
Differences That Matter
Reasoning gap
Solar Open2 250B leads Solar Pro 2 (Preview) (Reasoning) by 4.0 points on reasoning.
Top-pick rationale
Solar Open2 250B wins 5 measurable categories, including Reasoning, Intelligence, GPQA, HLE.
Response Face-Off
Run one prompt through the selected models and compare response quality with live speed and cost context.
Solar Open2 250B
Upstage
TTFT
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Time
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tok/s
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Tokens
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Cost
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Solar Pro 2 (Preview) (Reasoning)
Upstage
TTFT
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Time
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tok/s
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Tokens
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Cost
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Which answer was more useful?
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Full Comparison
| Metric | Top Pick Up Solar Open2 250B | Up Solar Pro 2 (Preview) (Reasoning) |
|---|---|---|
| Pricing per 1M tokens | ||
| Input Cost | $0.00/1M | $0.00/1M |
| Output Cost | $0.00/1M | $0.00/1M |
| Specifications | ||
| Organization | Upstage | Upstage |
| Release Date | Aug 12, 2026 | May 20, 2025 |
| Performance & Speed | ||
| Throughput | — | — |
| TTFT | — | — |
| Latency | — | — |
| Composite Indices | ||
| Reasoning Score | 50.5 | 46.5 |
| Intelligence | 37.4 | 12.5 |
| Coding | 44.7 | — |
| Standard Benchmarks | ||
| GPQA | 85.7% | 57.8% |
| MMLU Pro | — | 76.8% |
| HLE | 28.5% | 6.1% |
| LiveCodeBench | — | 46.2% |
| MATH 500 | — | 90.0% |
| AIME (Original) | — | 66.3% |
| SciCode | 45.6% | 16.4% |
| LCR | 68.3% | — |
Key Takeaways
Solar Open2 250B offers the best value at $0.00/1M,making it ideal for high-volume applications and cost-conscious projects.
Solar Open2 250B has the strongest reasoning profile with a 50.5 reasoning score,combining the available reasoning-heavy benchmarks.
Solar Open2 250B reaches a 44.7 coding index,making it the top choice for software development and code generation tasks.
All models support context windows of ∞+ tokens,suitable for processing lengthy documents and maintaining extended conversations.
When to Choose Each Model
Solar Open2 250B
- Cost-sensitive applications
- High-volume processing
- Complex reasoning tasks
- Research & analysis
- Code generation
- Software development
Solar Pro 2 (Preview) (Reasoning)
- General-purpose AI
- Versatile applications
