Model Comparison
Qwen3.5 2B (Non-reasoning)
vs. Qwen3.5 4B (Non-reasoning)
Comparing 2 AI models · 7 benchmarks · Alibaba
Recommended Pick
AlQwen3.5 4B (Non-reasoning)11 metric winsStrongest on: Throughput, Reasoning, Intelligence
Lowest Price
Qwen3.5 2B (Non-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
Qwen3.5 2B (Non-reasoning) is ∞x cheaper on input tokens than Qwen3.5 4B (Non-reasoning).
Reasoning gap
Qwen3.5 4B (Non-reasoning) leads Qwen3.5 2B (Non-reasoning) by 13.5 points on reasoning.
Coding gap
Qwen3.5 4B (Non-reasoning) leads Qwen3.5 2B (Non-reasoning) by 17.9 points on coding.
Top-pick rationale
Qwen3.5 4B (Non-reasoning) wins 11 measurable categories, including Throughput, Reasoning, Intelligence, Coding.
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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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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Which answer was more useful?
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Full Comparison
| Metric | Al Qwen3.5 2B (Non-reasoning) | Top Pick Al Qwen3.5 4B (Non-reasoning) |
|---|---|---|
| Pricing per 1M tokens | ||
| Input Cost | $0.00/1M | $0.03/1M |
| Output Cost | $0.00/1M | $0.15/1M |
| Blended (3:1) | — | $0.06/1M |
| Specifications | ||
| Organization | Alibaba | Alibaba |
| Release Date | Mar 2, 2026 | Mar 2, 2026 |
| Performance & Speed | ||
| Throughput | — | 28.8 tok/s |
| TTFT | — | 413ms |
| Latency | — | 413ms |
| Composite Indices | ||
| Value Score | — | 100.0 |
| Reasoning Score | 18.1 | 31.6 |
| Intelligence | 5.6 | 16.0 |
| Coding | 2.4 | 20.3 |
| Standard Benchmarks | ||
| GPQA | 43.8% | 71.2% |
| HLE | 4.9% | 7.5% |
| SciCode | 7.2% | 18.3% |
| LCR | 13.7% | 28.3% |
| IFBench | 29.1% | 33.3% |
| TAU-bench v2 | 81.6% | 87.7% |
| TerminalBench Hard | 3.8% | 11.4% |
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.
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 2B (Non-reasoning)
- Cost-sensitive applications
- High-volume processing
Qwen3.5 4B (Non-reasoning)
- Complex reasoning tasks
- Research & analysis
- Code generation
- Software development
