Model Comparison
Solar Pro 2 (Reasoning)
vs. Gemini 3.1 Pro Preview
Comparing 2 AI models · 12 benchmarks · Upstage, Google
Recommended Pick
GoGemini 3.1 Pro Preview10 metric winsStrongest on: Throughput, Reasoning, Intelligence
Lowest Price
Solar Pro 2 (Reasoning)
$0.00/1M input price
Best Reasoning
Gemini 3.1 Pro Preview
61.8 reasoning score
Blends available reasoning benchmarks
Best for Coding
Gemini 3.1 Pro Preview
68.8 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 (Reasoning) is ∞x cheaper on input tokens than Gemini 3.1 Pro Preview.
Reasoning gap
Gemini 3.1 Pro Preview leads Solar Pro 2 (Reasoning) by 8.5 points on reasoning.
Top-pick rationale
Gemini 3.1 Pro Preview wins 10 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 (Reasoning)
Upstage
TTFT
—
Time
—
tok/s
—
Tokens
—
Cost
—
Gemini 3.1 Pro Preview
TTFT
—
Time
—
tok/s
—
Tokens
—
Cost
—
Which answer was more useful?
Chat with leading AI models
Use Claude, ChatGPT, Gemini alongside with EU-Hosted Models like Deepseek, Qwen & Kimi.
EU-hosted inference
Servers in Germany & Finland. Designed to meet strict GDPR and ISO 27001 compliance requirements.
Full Comparison
| Metric | Up Solar Pro 2 (Reasoning) | Top Pick Go Gemini 3.1 Pro Preview |
|---|---|---|
| Pricing per 1M tokens | ||
| Input Cost | $0.00/1M | $2.00/1M |
| Output Cost | $0.00/1M | $12.00/1M |
| Blended (3:1) | — | $4.50/1M |
| Specifications | ||
| Organization | Upstage | |
| Release Date | Jul 9, 2025 | Feb 19, 2026 |
| Performance & Speed | ||
| Throughput | — | 139.9 tok/s |
| TTFT | — | 20898ms |
| Latency | — | 20898ms |
| Composite Indices | ||
| Value Score | — | 100.0 |
| Reasoning Score | 53.3 | 61.8 |
| Intelligence | 9.0 | 46.5 |
| Coding | — | 68.8 |
| Math | 61.3 | — |
| Standard Benchmarks | ||
| GPQA | 68.7% | 94.1% |
| MMLU Pro | 80.5% | — |
| HLE | 7.0% | 44.7% |
| LiveCodeBench | 61.6% | — |
| MATH 500 | 96.7% | — |
| AIME 2025 | 61.3% | — |
| AIME (Original) | 69.0% | — |
| SciCode | 30.2% | 58.9% |
| LCR | 0.0% | 72.7% |
| IFBench | 37.1% | 77.1% |
| TAU-bench v2 | 28.1% | 95.6% |
| TerminalBench Hard | 3.0% | 53.8% |
Key Takeaways
Solar Pro 2 (Reasoning) offers the best value at $0.00/1M,making it ideal for high-volume applications and cost-conscious projects.
Gemini 3.1 Pro Preview has the strongest reasoning profile with a 61.8 reasoning score,combining the available reasoning-heavy benchmarks.
Gemini 3.1 Pro Preview reaches a 68.8 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 (Reasoning)
- Cost-sensitive applications
- High-volume processing
Gemini 3.1 Pro Preview
- Complex reasoning tasks
- Research & analysis
- Code generation
- Software development
