Model Comparison
Solar Mini 4
vs. Step 5 Preview
Comparing 2 AI models · 0 benchmarks · Upstage, StepFun
Recommended Pick
UpSolar Mini 45 metric winsStrongest on: Value, Input price, Output price
Best Value
Solar Mini 4
100.0 value score
24.1 reasoning / $0.18/1M
Lowest Price
Solar Mini 4
$0.10/1M input price
Best Reasoning
Step 5 Preview
43.7 reasoning score
Blends available reasoning benchmarks
Differences That Matter
Best value
Solar Mini 4 has the strongest quality-to-price mix at 100.0 out of 100 value points.
Price gap
Solar Mini 4 is 10x cheaper on input tokens than Step 5 Preview.
Speed gap
Step 5 Preview generates about 1.1x as many tokens per second as Solar Mini 4.
Reasoning gap
Step 5 Preview leads Solar Mini 4 by 19.6 points on reasoning.
Top-pick rationale
Solar Mini 4 wins 5 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.
Solar Mini 4
Upstage
TTFT
—
Time
—
tok/s
—
Tokens
—
Cost
—
Step 5 Preview
StepFun
TTFT
—
Time
—
tok/s
—
Tokens
—
Cost
—
Which answer was more useful?
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Full Comparison
| Metric | Top Pick Up Solar Mini 4 | St Step 5 Preview |
|---|---|---|
| Pricing per 1M tokens | ||
| Input Cost | $0.10/1M | $1.00/1M |
| Output Cost | $0.40/1M | $2.70/1M |
| Blended (3:1) | $0.18/1M | $1.43/1M |
| Specifications | ||
| Organization | Upstage | StepFun |
| Release Date | Sep 22, 2026 | Sep 18, 2026 |
| Performance & Speed | ||
| Throughput | 80.6 tok/s | 92.1 tok/s |
| TTFT | 1860ms | 2860ms |
| Latency | 26690ms | 24580ms |
| Composite Indices | ||
| Value Score | 100.0 | 22.3 |
| Reasoning Score | 24.1 | 43.7 |
| Intelligence | 24.1 | 43.7 |
Key Takeaways
Solar Mini 4 offers the best value at $0.10/1M,making it ideal for high-volume applications and cost-conscious projects.
Step 5 Preview 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
Solar Mini 4
- Cost-sensitive applications
- High-volume processing
Step 5 Preview
- Complex reasoning tasks
- Research & analysis
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