Gemini 3.5 Flash vs Step 3.5 Flash 2603
Google vs StepFun — benchmarks, pricing, and capabilities side by side.
- •Gemini 3.5 Flash has the higher intelligence index (92.2 vs 82.6)
- •Step 3.5 Flash 2603 is cheaper ($0.00 vs $1.50 per 1M input)
- •Gemini 3.5 Flash is faster
| Gemini 3.5 Flash | Step 3.5 Flash 2603 | |
|---|---|---|
| Intelligence index | 92.2 | 82.6 |
| Developer | StepFun | |
| Type | Multimodal | LLM |
| Access | API only | — |
| Context window | 1,048,576 tokens | — |
| Input price | $1.50 / 1M | $0.00 / 1M |
| Output price | $9.00 / 1M | $0.00 / 1M |
| Speed | 221 tok/s | 197 tok/s |
| Released | May 19, 2026 | April 2, 2026 |
| Parameters | — | — |
| Input modalities | Text, Image, Audio, Video | — |
| Output modalities | Text | — |
Shared benchmarks
Gemini 3.5 Flash
Step 3.5 Flash 2603
GPQA Diamond
92.2
82.6
Humanity’s Last Exam
41
22.6