Model Comparison
Step 3.5 Flash 2603
vs. Gemini 4 Carbon (High)
Comparing 2 AI models · 0 benchmarks · StepFun, Google
Recommended Pick
StStep 3.5 Flash 26036 metric winsStrongest on: Input price, Output price, Blended price
Lowest Price
Step 3.5 Flash 2603
$0.10/1M input price
Differences That Matter
Price gap
Step 3.5 Flash 2603 is 40x cheaper on input tokens than Gemini 4 Carbon (High).
Speed gap
Step 3.5 Flash 2603 generates about 1.6x as many tokens per second as Gemini 4 Carbon (High).
Top-pick rationale
Step 3.5 Flash 2603 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.
Step 3.5 Flash 2603
StepFun
TTFT
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Time
—
tok/s
—
Tokens
—
Cost
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Gemini 4 Carbon (High)
TTFT
—
Time
—
tok/s
—
Tokens
—
Cost
—
Which answer was more useful?
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Servers in Germany & Finland. Operated by a German company under the GDPR, DPA available, ISO 27001-certified data centres.
Full Comparison
| Metric | Top Pick St Step 3.5 Flash 2603 | Go Gemini 4 Carbon (High) |
|---|---|---|
| Pricing per 1M tokens | ||
| Input Cost | $0.10/1M | $4.00/1M |
| Output Cost | $0.30/1M | $20.00/1M |
| Blended (3:1) | $0.15/1M | $8.00/1M |
| Specifications | ||
| Organization | StepFun | |
| Release Date | Apr 2, 2026 | Oct 28, 2026 |
| Performance & Speed | ||
| Throughput | 150.1 tok/s | 92.4 tok/s |
| TTFT | 3270ms | 100310ms |
| Latency | 16600ms | 100310ms |
| Composite Indices | ||
| Value Score | — | 100.0 |
| Reasoning Score | — | 59.4 |
| Intelligence | — | 59.4 |
Key Takeaways
Step 3.5 Flash 2603 offers the best value at $0.10/1M,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
Step 3.5 Flash 2603
- Cost-sensitive applications
- High-volume processing
Gemini 4 Carbon (High)
- General-purpose AI
- Versatile applications
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