Model Comparison
Solar Pro 3
vs. Step 3.7 Flash
Comparing 2 AI models · 0 benchmarks · Upstage, StepFun
Recommended Pick
UpSolar Pro 34 metric winsStrongest on: Input price, Output price, Blended price
Lowest Price
Solar Pro 3
$0.15/1M input price
Differences That Matter
Price gap
Solar Pro 3 is 1.3x cheaper on input tokens than Step 3.7 Flash.
Speed gap
Step 3.7 Flash generates about 1.3x as many tokens per second as Solar Pro 3.
Top-pick rationale
Solar Pro 3 wins 4 measurable categories, including Input price, Output price, Blended price, TTFT.
Response Face-Off
Run one prompt through the selected models and compare response quality with live speed and cost context.
Solar Pro 3
Upstage
TTFT
—
Time
—
tok/s
—
Tokens
—
Cost
—
Step 3.7 Flash
StepFun
TTFT
—
Time
—
tok/s
—
Tokens
—
Cost
—
Which answer was more useful?
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Full Comparison
| Metric | Top Pick Up Solar Pro 3 | St Step 3.7 Flash |
|---|---|---|
| Pricing per 1M tokens | ||
| Input Cost | $0.15/1M | $0.20/1M |
| Output Cost | $0.60/1M | $1.15/1M |
| Blended (3:1) | $0.26/1M | $0.44/1M |
| Specifications | ||
| Organization | Upstage | StepFun |
| Release Date | Apr 6, 2026 | May 29, 2026 |
| Performance & Speed | ||
| Throughput | 159.0 tok/s | 213.2 tok/s |
| TTFT | 1250ms | 2530ms |
| Latency | 13830ms | 11920ms |
Key Takeaways
Solar Pro 3 offers the best value at $0.15/1M,making it ideal for high-volume applications and cost-conscious projects.
All models support context windows of ∞+ tokens,suitable for processing lengthy documents and maintaining extended conversations.
When to Choose Each Model
Solar Pro 3
- Cost-sensitive applications
- High-volume processing
Step 3.7 Flash
- General-purpose AI
- Versatile applications
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