Model Comparison
Solar Mini 4
vs. Step 3.5 Flash
Comparing 2 AI models · 0 benchmarks · Upstage, StepFun
Recommended Pick
UpSolar Mini 44 metric winsStrongest on: Value, TTFT, Reasoning
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
Solar Mini 4
24.1 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.
Speed gap
Step 3.5 Flash generates about 1.9x as many tokens per second as Solar Mini 4.
Reasoning gap
Solar Mini 4 leads Step 3.5 Flash by 7.5 points on reasoning.
Top-pick rationale
Solar Mini 4 wins 4 measurable categories, including Value, TTFT, Reasoning, Intelligence.
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 3.5 Flash
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 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 | Top Pick Up Solar Mini 4 | St Step 3.5 Flash |
|---|---|---|
| Pricing per 1M tokens | ||
| Input Cost | $0.10/1M | $0.10/1M |
| Output Cost | $0.40/1M | $0.30/1M |
| Blended (3:1) | $0.18/1M | $0.15/1M |
| Specifications | ||
| Organization | Upstage | StepFun |
| Release Date | Sep 22, 2026 | Feb 2, 2026 |
| Performance & Speed | ||
| Throughput | 81.1 tok/s | 150.9 tok/s |
| TTFT | 1840ms | 3360ms |
| Latency | 26510ms | 16610ms |
| Composite Indices | ||
| Value Score | 100.0 | 80.4 |
| Reasoning Score | 24.1 | 16.6 |
| Intelligence | 24.1 | 16.6 |
Key Takeaways
Solar Mini 4 offers the best value at $0.10/1M,making it ideal for high-volume applications and cost-conscious projects.
Solar Mini 4 has the strongest reasoning profile with a 24.1 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
- Complex reasoning tasks
- Research & analysis
Step 3.5 Flash
- General-purpose AI
- Versatile applications
Recommended Comparisons
Popular alternatives
