Model Comparison
Solar Open2 250B
vs. Sonar Reasoning Pro
Comparing 2 AI models · 6 benchmarks · Upstage, Perplexity
Recommended Pick
UpSolar Open2 250B1 metric winsStrongest on: Intelligence
Lowest Price
Solar Open2 250B
$0.00/1M input price
Best Reasoning
Sonar Reasoning Pro
64.2 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
Sonar Reasoning Pro leads Solar Open2 250B by 13.7 points on reasoning.
Top-pick rationale
Solar Open2 250B wins 1 measurable categories, including Intelligence.
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
—
Time
—
tok/s
—
Tokens
—
Cost
—
Sonar Reasoning Pro
Perplexity
TTFT
—
Time
—
tok/s
—
Tokens
—
Cost
—
Which answer was more useful?
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Full Comparison
| Metric | Top Pick Up Solar Open2 250B | Pe Sonar Reasoning Pro |
|---|---|---|
| Pricing per 1M tokens | ||
| Input Cost | $0.00/1M | $0.00/1M |
| Output Cost | $0.00/1M | $0.00/1M |
| Specifications | ||
| Organization | Upstage | Perplexity |
| Release Date | Aug 12, 2026 | Jan 28, 2025 |
| Performance & Speed | ||
| Throughput | — | — |
| TTFT | — | — |
| Latency | — | — |
| Composite Indices | ||
| Reasoning Score | 50.5 | 64.2 |
| Intelligence | 37.4 | 18.0 |
| Coding | 44.7 | — |
| Standard Benchmarks | ||
| GPQA | 85.7% | — |
| HLE | 28.5% | — |
| MATH 500 | — | 95.7% |
| AIME (Original) | — | 79.0% |
| SciCode | 45.6% | — |
| 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.
Sonar Reasoning Pro has the strongest reasoning profile with a 64.2 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
- Code generation
- Software development
Sonar Reasoning Pro
- Complex reasoning tasks
- Research & analysis
