Model Comparison
Step 3.5 Flash 2603
vs. Step3 VL 10B
Comparing 2 AI models · 7 benchmarks · StepFun
Recommended Pick
StStep 3.5 Flash 260310 metric winsStrongest on: Throughput, Reasoning, Intelligence
Lowest Price
Step3 VL 10B
$0.00/1M input price
Best Reasoning
Step 3.5 Flash 2603
43.7 reasoning score
Blends available reasoning benchmarks
Composite Indices
Higher is better; speed and price are normalized
Standard Benchmarks
Only benchmarks with data are shown
Differences That Matter
Price gap
Step3 VL 10B is ∞x cheaper on input tokens than Step 3.5 Flash 2603.
Reasoning gap
Step 3.5 Flash 2603 leads Step3 VL 10B by 14.2 points on reasoning.
Top-pick rationale
Step 3.5 Flash 2603 wins 10 measurable categories, including Throughput, Reasoning, Intelligence, GPQA.
Response Face-Off
Run one prompt through the selected models and compare response quality with live speed and cost context.
Step 3.5 Flash 2603
StepFun
TTFT
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Time
—
tok/s
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Tokens
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Cost
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Step3 VL 10B
StepFun
TTFT
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Time
—
tok/s
—
Tokens
—
Cost
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Which answer was more useful?
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Full Comparison
| Metric | Top Pick St Step 3.5 Flash 2603 | St Step3 VL 10B |
|---|---|---|
| Pricing per 1M tokens | ||
| Input Cost | $0.10/1M | $0.00/1M |
| Output Cost | $0.30/1M | $0.00/1M |
| Blended (3:1) | $0.15/1M | — |
| Specifications | ||
| Organization | StepFun | StepFun |
| Release Date | Apr 2, 2026 | Jan 20, 2026 |
| Performance & Speed | ||
| Throughput | 219.2 tok/s | — |
| TTFT | 716ms | — |
| Latency | 9841ms | — |
| Composite Indices | ||
| Value Score | 100.0 | — |
| Reasoning Score | 43.7 | 29.6 |
| Intelligence | 26.0 | 9.5 |
| Standard Benchmarks | ||
| GPQA | 82.6% | 69.0% |
| HLE | 22.6% | 10.2% |
| SciCode | 38.5% | 31.1% |
| LCR | 54.3% | 0.0% |
| IFBench | 66.5% | 50.2% |
| TAU-bench v2 | 87.4% | 16.1% |
| TerminalBench Hard | 32.6% | 5.3% |
Key Takeaways
Step3 VL 10B offers the best value at $0.00/1M,making it ideal for high-volume applications and cost-conscious projects.
Step 3.5 Flash 2603 has the strongest reasoning profile with a 43.7 reasoning score,combining the available reasoning-heavy benchmarks.
All models support context windows of ∞+ tokens,suitable for processing lengthy documents and maintaining extended conversations.
When to Choose Each Model
Step 3.5 Flash 2603
- Complex reasoning tasks
- Research & analysis
Step3 VL 10B
- Cost-sensitive applications
- High-volume processing
