Model Comparison
Qwen3.5 2B (Reasoning)
vs. Solar Open 100B (Reasoning)
Comparing 2 AI models · 7 benchmarks · Alibaba, Upstage
Recommended Pick
UpSolar Open 100B (Reasoning)7 metric winsStrongest on: Reasoning, Intelligence, GPQA
Lowest Price
Qwen3.5 2B (Reasoning)
$0.00/1M input price
Best Reasoning
Solar Open 100B (Reasoning)
30.0 reasoning score
Blends available reasoning benchmarks
Best for Coding
Qwen3.5 2B (Reasoning)
2.9 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 Open 100B (Reasoning) leads Qwen3.5 2B (Reasoning) by 11.6 points on reasoning.
Top-pick rationale
Solar Open 100B (Reasoning) wins 7 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 (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 Open 100B (Reasoning)
Upstage
TTFT
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Time
—
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 | Al Qwen3.5 2B (Reasoning) | Top Pick Up Solar Open 100B (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 | Dec 17, 2025 |
| Performance & Speed | ||
| Throughput | — | — |
| TTFT | — | — |
| Latency | — | — |
| Composite Indices | ||
| Reasoning Score | 18.4 | 30.0 |
| Intelligence | 7.6 | 15.1 |
| Coding | 2.9 | — |
| Standard Benchmarks | ||
| GPQA | 45.6% | 65.7% |
| HLE | 2.1% | 9.2% |
| SciCode | 2.8% | 26.9% |
| LCR | 23.7% | 36.0% |
| IFBench | 31.5% | 57.7% |
| TAU-bench v2 | 69.0% | 48.2% |
| TerminalBench Hard | 3.8% | 2.3% |
Key Takeaways
Qwen3.5 2B (Reasoning) offers the best value at $0.00/1M,making it ideal for high-volume applications and cost-conscious projects.
Solar Open 100B (Reasoning) has the strongest reasoning profile with a 30.0 reasoning score,combining the available reasoning-heavy benchmarks.
Qwen3.5 2B (Reasoning) reaches a 2.9 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 (Reasoning)
- Cost-sensitive applications
- High-volume processing
- Code generation
- Software development
Solar Open 100B (Reasoning)
- Complex reasoning tasks
- Research & analysis
