Model Comparison
Qwen3.5 2B (Non-reasoning)
vs. Solar Pro 2 (Reasoning)
Comparing 2 AI models · 12 benchmarks · Alibaba, Upstage
Recommended Pick
UpSolar Pro 2 (Reasoning)6 metric winsStrongest on: Reasoning, Intelligence, GPQA
Lowest Price
Qwen3.5 2B (Non-reasoning)
$0.00/1M input price
Best Reasoning
Solar Pro 2 (Reasoning)
53.3 reasoning score
Blends available reasoning benchmarks
Best for Coding
Qwen3.5 2B (Non-reasoning)
2.4 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 Pro 2 (Reasoning) leads Qwen3.5 2B (Non-reasoning) by 35.2 points on reasoning.
Top-pick rationale
Solar Pro 2 (Reasoning) wins 6 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.
Qwen3.5 2B (Non-reasoning)
Alibaba
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 (Reasoning)
Upstage
TTFT
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Time
—
tok/s
—
Tokens
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Cost
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Which answer was more useful?
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Servers in Germany & Finland. Designed to meet strict GDPR and ISO 27001 compliance requirements.
Full Comparison
| Metric | Al Qwen3.5 2B (Non-reasoning) | Top Pick Up Solar Pro 2 (Reasoning) |
|---|---|---|
| Pricing per 1M tokens | ||
| Input Cost | $0.00/1M | $0.00/1M |
| Output Cost | $0.00/1M | $0.00/1M |
| Specifications | ||
| Organization | Alibaba | Upstage |
| Release Date | Mar 2, 2026 | Jul 9, 2025 |
| Performance & Speed | ||
| Throughput | — | — |
| TTFT | — | — |
| Latency | — | — |
| Composite Indices | ||
| Reasoning Score | 18.1 | 53.3 |
| Intelligence | 5.6 | 9.0 |
| Coding | 2.4 | — |
| Math | — | 61.3 |
| Standard Benchmarks | ||
| GPQA | 43.8% | 68.7% |
| MMLU Pro | — | 80.5% |
| HLE | 4.9% | 7.0% |
| LiveCodeBench | — | 61.6% |
| MATH 500 | — | 96.7% |
| AIME 2025 | — | 61.3% |
| AIME (Original) | — | 69.0% |
| SciCode | 7.2% | 30.2% |
| LCR | 13.7% | 0.0% |
| IFBench | 29.1% | 37.1% |
| TAU-bench v2 | 81.6% | 28.1% |
| TerminalBench Hard | 3.8% | 3.0% |
Key Takeaways
Qwen3.5 2B (Non-reasoning) offers the best value at $0.00/1M,making it ideal for high-volume applications and cost-conscious projects.
Solar Pro 2 (Reasoning) has the strongest reasoning profile with a 53.3 reasoning score,combining the available reasoning-heavy benchmarks.
Qwen3.5 2B (Non-reasoning) reaches a 2.4 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
Qwen3.5 2B (Non-reasoning)
- Cost-sensitive applications
- High-volume processing
- Code generation
- Software development
Solar Pro 2 (Reasoning)
- Complex reasoning tasks
- Research & analysis
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