Model Comparison
Qwen3.5 4B (Non-reasoning)
vs. Solar Open 100B (Reasoning)
Comparing 2 AI models · 7 benchmarks · Alibaba, Upstage
Recommended Pick
UpSolar Open 100B (Reasoning)8 metric winsStrongest on: Input price, Output price, TTFT
Lowest Price
Solar Open 100B (Reasoning)
$0.00/1M input price
Best Reasoning
Qwen3.5 4B (Non-reasoning)
31.6 reasoning score
Blends available reasoning benchmarks
Best for Coding
Qwen3.5 4B (Non-reasoning)
20.3 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 Open 100B (Reasoning) is ∞x cheaper on input tokens than Qwen3.5 4B (Non-reasoning).
Reasoning gap
Qwen3.5 4B (Non-reasoning) leads Solar Open 100B (Reasoning) by 1.6 points on reasoning.
Top-pick rationale
Solar Open 100B (Reasoning) wins 8 measurable categories, including Input price, Output price, TTFT, Latency.
Response Face-Off
Run one prompt through the selected models and compare response quality with live speed and cost context.
Qwen3.5 4B (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 Open 100B (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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Which answer was more useful?
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Full Comparison
| Metric | Al Qwen3.5 4B (Non-reasoning) | Top Pick Up Solar Open 100B (Reasoning) |
|---|---|---|
| Pricing per 1M tokens | ||
| Input Cost | $0.03/1M | $0.00/1M |
| Output Cost | $0.15/1M | $0.00/1M |
| Blended (3:1) | $0.06/1M | — |
| Specifications | ||
| Organization | Alibaba | Upstage |
| Release Date | Mar 2, 2026 | Dec 17, 2025 |
| Performance & Speed | ||
| Throughput | 37.7 tok/s | — |
| TTFT | 335ms | — |
| Latency | 335ms | — |
| Composite Indices | ||
| Value Score | 100.0 | — |
| Reasoning Score | 31.6 | 30.0 |
| Intelligence | 16.0 | 15.1 |
| Coding | 20.3 | — |
| Standard Benchmarks | ||
| GPQA | 71.2% | 65.7% |
| HLE | 7.5% | 9.2% |
| SciCode | 18.3% | 26.9% |
| LCR | 28.3% | 36.0% |
| IFBench | 33.3% | 57.7% |
| TAU-bench v2 | 87.7% | 48.2% |
| TerminalBench Hard | 11.4% | 2.3% |
Key Takeaways
Solar Open 100B (Reasoning) offers the best value at $0.00/1M,making it ideal for high-volume applications and cost-conscious projects.
Qwen3.5 4B (Non-reasoning) has the strongest reasoning profile with a 31.6 reasoning score,combining the available reasoning-heavy benchmarks.
Qwen3.5 4B (Non-reasoning) reaches a 20.3 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 4B (Non-reasoning)
- Complex reasoning tasks
- Research & analysis
- Code generation
- Software development
Solar Open 100B (Reasoning)
- Cost-sensitive applications
- High-volume processing
