Model Comparison
Qwen3 4B (Reasoning)
vs. Qwen3.5 4B (Reasoning)
Comparing 2 AI models · 12 benchmarks · Alibaba
Recommended Pick
Al Qwen3.5 4B (Reasoning) 12 metric wins Strongest on: Value, Input price, Output price
Best Value
Qwen3.5 4B (Reasoning)
100.0 value score
37.3 reasoning / $0.06/1M
Lowest Price
Qwen3.5 4B (Reasoning)
$0.03/1M input price
Best Reasoning
Qwen3 4B (Reasoning)
39.3 reasoning score
Blends available reasoning benchmarks
Best for Coding
Qwen3.5 4B (Reasoning)
17.5 coding index
Composite Indices
Higher is better; speed and price are normalized
Standard Benchmarks
Only benchmarks with data are shown
Differences That Matter
Best value
Qwen3.5 4B (Reasoning) has the strongest quality-to-price mix at 100.0 out of 100 value points.
Price gap
Qwen3.5 4B (Reasoning) is 3.7x cheaper on input tokens than Qwen3 4B (Reasoning).
Reasoning gap
Qwen3 4B (Reasoning) leads Qwen3.5 4B (Reasoning) by 2.0 points on reasoning.
Top-pick rationale
Qwen3.5 4B (Reasoning) wins 12 measurable categories, including Value, Input price, Output price, Blended price.
Response Face-Off
Run one prompt through the selected models and compare response quality with live speed and cost context.
Qwen3 4B (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 (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?
Full Comparison
| Metric | Al Qwen3 4B (Reasoning) | Top Pick Al Qwen3.5 4B (Reasoning) |
|---|---|---|
| Pricing per 1M tokens | ||
| Input Cost | $0.11/1M | $0.03/1M |
| Output Cost | $1.26/1M | $0.15/1M |
| Blended (3:1) | $0.40/1M | $0.06/1M |
| Specifications | ||
| Organization | Alibaba | Alibaba |
| Release Date | Apr 28, 2025 | Mar 2, 2026 |
| Performance & Speed | ||
| Throughput | — | 203.6 tok/s |
| TTFT | — | 229ms |
| Latency | — | 10053ms |
| Composite Indices | ||
| Value Score | 15.9 | 100.0 |
| Reasoning Score | 39.3 | 37.3 |
| Intelligence | 14.2 | 27.1 |
| Coding | — | 17.5 |
| Math | 22.3 | — |
| Standard Benchmarks | ||
| GPQA | 52.2% | 77.1% |
| MMLU Pro | 69.6% | — |
| HLE | 5.1% | 7.8% |
| LiveCodeBench | 46.5% | — |
| MATH 500 | 93.3% | — |
| AIME 2025 | 22.3% | — |
| AIME (Original) | 65.7% | — |
| SciCode | 3.5% | 16.1% |
| LCR | 0.0% | 55.7% |
| IFBench | 32.5% | 52.0% |
| TAU-bench v2 | 19.0% | 92.1% |
| TerminalBench Hard | — | 18.2% |
Key Takeaways
Qwen3.5 4B (Reasoning) offers the best value at $0.03/1M, making it ideal for high-volume applications and cost-conscious projects.
Qwen3 4B (Reasoning) has the strongest reasoning profile with a 39.3 reasoning score, combining the available reasoning-heavy benchmarks.
Qwen3.5 4B (Reasoning) reaches a 17.5 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 4B (Reasoning)
- Complex reasoning tasks
- Research & analysis
Qwen3.5 4B (Reasoning)
- Cost-sensitive applications
- High-volume processing
- Code generation
- Software development
