Model Comparison
Qwen3.5 4B (Non-reasoning)
vs. Step 3.7 Flash
Comparing 2 AI models · 7 benchmarks · Alibaba, StepFun
Recommended Pick
StStep 3.7 Flash11 metric winsStrongest on: Throughput, Reasoning, Intelligence
Best Value
Qwen3.5 4B (Non-reasoning)
100.0 value score
31.6 reasoning / $0.06/1M
Lowest Price
Qwen3.5 4B (Non-reasoning)
$0.03/1M input price
Best Reasoning
Step 3.7 Flash
43.7 reasoning score
Blends available reasoning benchmarks
Best for Coding
Step 3.7 Flash
39.6 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 (Non-reasoning) has the strongest quality-to-price mix at 100.0 out of 100 value points.
Price gap
Qwen3.5 4B (Non-reasoning) is 6.7x cheaper on input tokens than Step 3.7 Flash.
Speed gap
Step 3.7 Flash generates about 15.1x as many tokens per second as Qwen3.5 4B (Non-reasoning).
Reasoning gap
Step 3.7 Flash leads Qwen3.5 4B (Non-reasoning) by 12.1 points on reasoning.
Coding gap
Step 3.7 Flash leads Qwen3.5 4B (Non-reasoning) by 19.3 points on coding.
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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Step 3.7 Flash
StepFun
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 St Step 3.7 Flash |
|---|---|---|
| Pricing per 1M tokens | ||
| Input Cost | $0.03/1M | $0.20/1M |
| Output Cost | $0.15/1M | $1.15/1M |
| Blended (3:1) | $0.06/1M | $0.44/1M |
| Specifications | ||
| Organization | Alibaba | StepFun |
| Release Date | Mar 2, 2026 | May 29, 2026 |
| Performance & Speed | ||
| Throughput | 27.1 tok/s | 408.7 tok/s |
| TTFT | 430ms | 691ms |
| Latency | 430ms | 5584ms |
| Composite Indices | ||
| Value Score | 100.0 | 19.0 |
| Reasoning Score | 31.6 | 43.7 |
| Intelligence | 16.0 | 30.3 |
| Coding | 20.3 | 39.6 |
| Standard Benchmarks | ||
| GPQA | 71.2% | 80.9% |
| HLE | 7.5% | 19.9% |
| SciCode | 18.3% | 40.0% |
| LCR | 28.3% | 63.7% |
| IFBench | 33.3% | 67.3% |
| TAU-bench v2 | 87.7% | 98.5% |
| TerminalBench Hard | 11.4% | 35.6% |
Key Takeaways
Qwen3.5 4B (Non-reasoning) offers the best value at $0.03/1M,making it ideal for high-volume applications and cost-conscious projects.
Step 3.7 Flash has the strongest reasoning profile with a 43.7 reasoning score,combining the available reasoning-heavy benchmarks.
Step 3.7 Flash reaches a 39.6 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)
- Cost-sensitive applications
- High-volume processing
Step 3.7 Flash
- Complex reasoning tasks
- Research & analysis
- Code generation
- Software development
