Model Comparison
Solar Pro 3
vs. Step 5 Preview
Comparing 2 AI models · 0 benchmarks · Upstage, StepFun
Recommended Pick
StStep 5 Preview3 metric winsStrongest on: Throughput, TTFT, Latency
Lowest Price
Solar Pro 3
$0.15/1M input price
Differences That Matter
Price gap
Solar Pro 3 is 6.7x cheaper on input tokens than Step 5 Preview.
Top-pick rationale
Step 5 Preview wins 3 measurable categories, including Throughput, TTFT, Latency.
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
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Time
—
tok/s
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Tokens
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Cost
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Step 5 Preview
StepFun
TTFT
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Time
—
tok/s
—
Tokens
—
Cost
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Which answer was more useful?
Secure AI Chat made in Europe
Chat with EU-Hosted Models like Deepseek, Qwen & Kimi: open-weight, transparent, no lock-in.
EU-hosted open models, one API
Servers in Germany & Finland. Operated by a German company under the GDPR, DPA available, ISO 27001-certified data centres.
Full Comparison
| Metric | Up Solar Pro 3 | Top Pick St Step 5 Preview |
|---|---|---|
| Pricing per 1M tokens | ||
| Input Cost | $0.15/1M | $1.00/1M |
| Output Cost | $0.60/1M | $2.70/1M |
| Blended (3:1) | $0.26/1M | $1.43/1M |
| Specifications | ||
| Organization | Upstage | StepFun |
| Release Date | Apr 6, 2026 | Sep 18, 2026 |
| Performance & Speed | ||
| Throughput | 160.7 tok/s | 165.1 tok/s |
| TTFT | 1250ms | 880ms |
| Latency | 13690ms | 12990ms |
| Composite Indices | ||
| Value Score | — | 100.0 |
| Reasoning Score | — | 28.5 |
| Intelligence | — | 28.5 |
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 5 Preview
- General-purpose AI
- Versatile applications
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