Model Comparison
Solar Pro 2 (Non-reasoning)
vs. Solar Pro 4
Comparing 2 AI models · 12 benchmarks · Upstage
Recommended Pick
UpSolar Pro 47 metric winsStrongest on: Throughput, Reasoning, Intelligence
Lowest Price
Solar Pro 2 (Non-reasoning)
$0.00/1M input price
Best Reasoning
Solar Pro 4
53.3 reasoning score
Blends available reasoning benchmarks
Best for Coding
Solar Pro 4
52.7 coding index
Composite Indices
Higher is better; speed and price are normalized
Standard Benchmarks
Only benchmarks with data are shown
Differences That Matter
Price gap
Solar Pro 2 (Non-reasoning) is ∞x cheaper on input tokens than Solar Pro 4.
Reasoning gap
Solar Pro 4 leads Solar Pro 2 (Non-reasoning) by 16.6 points on reasoning.
Top-pick rationale
Solar Pro 4 wins 7 measurable categories, including Throughput, Reasoning, Intelligence, GPQA.
Response Face-Off
Run one prompt through the selected models and compare response quality with live speed and cost context.
Solar Pro 2 (Non-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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Solar Pro 4
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 | Up Solar Pro 2 (Non-reasoning) | Top Pick Up Solar Pro 4 |
|---|---|---|
| Pricing per 1M tokens | ||
| Input Cost | $0.00/1M | $0.30/1M |
| Output Cost | $0.00/1M | $1.20/1M |
| Blended (3:1) | — | $0.52/1M |
| Specifications | ||
| Organization | Upstage | Upstage |
| Release Date | Jul 9, 2025 | Aug 6, 2026 |
| Performance & Speed | ||
| Throughput | — | 66.3 tok/s |
| TTFT | — | 1239ms |
| Latency | — | 31422ms |
| Composite Indices | ||
| Value Score | — | 100.0 |
| Reasoning Score | 36.7 | 53.3 |
| Intelligence | 7.6 | 41.6 |
| Coding | — | 52.7 |
| Math | 30.0 | — |
| Standard Benchmarks | ||
| GPQA | 56.1% | 89.1% |
| MMLU Pro | 75.0% | — |
| HLE | 3.7% | 29.2% |
| LiveCodeBench | 42.4% | — |
| MATH 500 | 88.9% | — |
| AIME 2025 | 30.0% | — |
| AIME (Original) | 40.7% | — |
| SciCode | 24.8% | 43.6% |
| LCR | 0.0% | 70.7% |
| IFBench | 33.7% | — |
| TAU-bench v2 | 31.9% | — |
| TerminalBench Hard | 4.5% | — |
Key Takeaways
Solar Pro 2 (Non-reasoning) offers the best value at $0.00/1M,making it ideal for high-volume applications and cost-conscious projects.
Solar Pro 4 has the strongest reasoning profile with a 53.3 reasoning score,combining the available reasoning-heavy benchmarks.
Solar Pro 4 reaches a 52.7 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 Pro 2 (Non-reasoning)
- Cost-sensitive applications
- High-volume processing
Solar Pro 4
- Complex reasoning tasks
- Research & analysis
- Code generation
- Software development
