Model Comparison
Qwen3 8B (Reasoning)
vs. Step 3.5 Flash 2603
Comparing 2 AI models · 0 benchmarks · Alibaba, StepFun
Recommended Pick
StStep 3.5 Flash 26039 metric winsStrongest on: Value, Input price, Output price
Best Value
Step 3.5 Flash 2603
100.0 value score
19.5 reasoning / $0.15/1M
Lowest Price
Step 3.5 Flash 2603
$0.10/1M input price
Best Reasoning
Step 3.5 Flash 2603
19.5 reasoning score
Blends available reasoning benchmarks
Best for Coding
Qwen3 8B (Reasoning)
9.0 coding index
Differences That Matter
Best value
Step 3.5 Flash 2603 has the strongest quality-to-price mix at 100.0 out of 100 value points.
Price gap
Step 3.5 Flash 2603 is 1.8x cheaper on input tokens than Qwen3 8B (Reasoning).
Speed gap
Step 3.5 Flash 2603 generates about 5.4x as many tokens per second as Qwen3 8B (Reasoning).
Reasoning gap
Step 3.5 Flash 2603 leads Qwen3 8B (Reasoning) by 16.7 points on reasoning.
Top-pick rationale
Step 3.5 Flash 2603 wins 9 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 8B (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 3.5 Flash 2603
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 8B (Reasoning) | Top Pick St Step 3.5 Flash 2603 |
|---|---|---|
| Pricing per 1M tokens | ||
| Input Cost | $0.18/1M | $0.10/1M |
| Output Cost | $2.10/1M | $0.30/1M |
| Blended (3:1) | $0.66/1M | $0.15/1M |
| Specifications | ||
| Organization | Alibaba | StepFun |
| Release Date | Apr 28, 2025 | Apr 2, 2026 |
| Performance & Speed | ||
| Throughput | 38.8 tok/s | 210.1 tok/s |
| TTFT | 3770ms | 1110ms |
| Latency | 55290ms | 10630ms |
| Composite Indices | ||
| Value Score | 3.3 | 100.0 |
| Reasoning Score | 2.8 | 19.5 |
| Intelligence | 2.8 | 19.5 |
| Coding | 9.0 | — |
Key Takeaways
Step 3.5 Flash 2603 offers the best value at $0.10/1M,making it ideal for high-volume applications and cost-conscious projects.
Step 3.5 Flash 2603 has the strongest reasoning profile with a 19.5 reasoning score,combining the available reasoning-heavy benchmarks.
Qwen3 8B (Reasoning) reaches a 9.0 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 8B (Reasoning)
- Code generation
- Software development
Step 3.5 Flash 2603
- Cost-sensitive applications
- High-volume processing
- Complex reasoning tasks
- Research & analysis
