Model Comparison
Solar Mini
vs. Step 3.5 Flash
Comparing 2 AI models · 8 benchmarks · Upstage, StepFun
Recommended Pick
StStep 3.5 Flash7 metric winsStrongest on: Value, Input price, Throughput
Best Value
Step 3.5 Flash
100.0 value score
42.6 reasoning / $0.15/1M
Lowest Price
Step 3.5 Flash
$0.10/1M input price
Best Reasoning
Step 3.5 Flash
42.6 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
Best value
Step 3.5 Flash has the strongest quality-to-price mix at 100.0 out of 100 value points.
Price gap
Step 3.5 Flash is 1.5x cheaper on input tokens than Solar Mini.
Speed gap
Step 3.5 Flash generates about 2.8x as many tokens per second as Solar Mini.
Reasoning gap
Step 3.5 Flash leads Solar Mini by 22.9 points on reasoning.
Top-pick rationale
Step 3.5 Flash wins 7 measurable categories, including Value, Input price, Throughput, TTFT.
Response Face-Off
Run one prompt through the selected models and compare response quality with live speed and cost context.
Solar Mini
Upstage
TTFT
—
Time
—
tok/s
—
Tokens
—
Cost
—
Step 3.5 Flash
StepFun
TTFT
—
Time
—
tok/s
—
Tokens
—
Cost
—
Which answer was more useful?
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Full Comparison
| Metric | Up Solar Mini | Top Pick St Step 3.5 Flash |
|---|---|---|
| Pricing per 1M tokens | ||
| Input Cost | $0.15/1M | $0.10/1M |
| Output Cost | $0.15/1M | $0.30/1M |
| Blended (3:1) | $0.15/1M | $0.15/1M |
| Specifications | ||
| Organization | Upstage | StepFun |
| Release Date | Jan 25, 2024 | Feb 2, 2026 |
| Performance & Speed | ||
| Throughput | 76.6 tok/s | 212.3 tok/s |
| TTFT | 794ms | 745ms |
| Latency | 794ms | 10167ms |
| Composite Indices | ||
| Value Score | 46.2 | 100.0 |
| Reasoning Score | 19.7 | 42.6 |
| Intelligence | 6.2 | 25.5 |
| Standard Benchmarks | ||
| GPQA | — | 83.1% |
| HLE | — | 19.1% |
| MATH 500 | 33.1% | — |
| SciCode | — | 40.4% |
| LCR | — | 43.0% |
| IFBench | — | 64.6% |
| TAU-bench v2 | 20.2% | 94.4% |
| TerminalBench Hard | — | 27.3% |
Key Takeaways
Step 3.5 Flash offers the best value at $0.10/1M,making it ideal for high-volume applications and cost-conscious projects.
Step 3.5 Flash has the strongest reasoning profile with a 42.6 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
Solar Mini
- General-purpose AI
- Versatile applications
Step 3.5 Flash
- Cost-sensitive applications
- High-volume processing
- Complex reasoning tasks
- Research & analysis
