Model Comparison
Solar Pro 3
vs. Step 5 Preview
Comparing 2 AI models · 0 benchmarks · Upstage, StepFun
Recommended Pick
UpSolar Pro 36 metric winsStrongest on: Input price, Output price, Blended price
Best Value
Step 5 Preview
100.0 value score
43.7 reasoning / $1.43/1M
Lowest Price
Solar Pro 3
$0.15/1M input price
Best Reasoning
Step 5 Preview
43.7 reasoning score
Blends available reasoning benchmarks
Best for Coding
Solar Pro 3
16.2 coding index
Differences That Matter
Best value
Step 5 Preview has the strongest quality-to-price mix at 100.0 out of 100 value points.
Price gap
Solar Pro 3 is 6.7x cheaper on input tokens than Step 5 Preview.
Speed gap
Solar Pro 3 generates about 1.6x as many tokens per second as Step 5 Preview.
Reasoning gap
Step 5 Preview leads Solar Pro 3 by 35.9 points on reasoning.
Top-pick rationale
Solar Pro 3 wins 6 measurable categories, including Input price, Output price, Blended price, Throughput.
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
—
Tokens
—
Cost
—
Step 5 Preview
StepFun
TTFT
—
Time
—
tok/s
—
Tokens
—
Cost
—
Which answer was more useful?
Secure AI Chat made in Europe
Use Claude, ChatGPT, Gemini alongside with EU-Hosted Models like Deepseek, Qwen & Kimi.
EU-hosted inference
Servers in Germany & Finland. Designed to meet strict GDPR and ISO 27001 compliance requirements.
Full Comparison
| Metric | Top Pick Up Solar Pro 3 | 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 | 145.4 tok/s | 91.5 tok/s |
| TTFT | 2360ms | 3100ms |
| Latency | 16110ms | 24960ms |
| Composite Indices | ||
| Value Score | 96.9 | 100.0 |
| Reasoning Score | 7.8 | 43.7 |
| Intelligence | 7.8 | 43.7 |
| Coding | 16.2 | — |
Key Takeaways
Solar Pro 3 offers the best value at $0.15/1M,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.
Solar Pro 3 reaches a 16.2 coding index,making it the top choice for software development and code generation tasks.
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
- Code generation
- Software development
Step 5 Preview
- Complex reasoning tasks
- Research & analysis
