Step 3.7 Flash
stepfun/step-3.7-flash
Step 3.7 Flash is StepFun's latest high-efficiency multimodal Mixture-of-Experts model.
Key facts
- Input price
- $0.20 / 1M tokens
- Output price
- $1.15 / 1M tokens
- Context window
- 262K tokens
- Max output
- 230K tokens
- Accepts
- Text, Images, Video
- Returns
- Text
Example: 1,000 requests with 1,000 input and 500 output tokens each would cost about $0.78 (1M input tokens × $0.20 + 0.5M output tokens × $1.15). Estimate your own usage.
Prices are the provider’s own per-token rates with zero markup, from our price list as of Oct 18, 2026. If a call has extra provider charges (images, audio, web search, cached prompts), you pay the reported cost.
Call it from your code
curl https://api.tokenctr.com/v1/chat/completions \
-H "Authorization: Bearer $TOKENCENTER_API_KEY" \
-H "Content-Type: application/json" \
-d '{"model": "stepfun/step-3.7-flash", "messages": [{"role": "user", "content": "Hello!"}]}'Works with any OpenAI-compatible SDK: set the base URL to https://api.tokenctr.com/v1. Quickstart
Benchmarks
Artificial Analysis
- Intelligence index
- 19.5
- Coding index
- 39.6
Design Arena
| Category | Rank | Elo | Win rate |
|---|---|---|---|
| Models: ASCII art | 42 | 1154 | 44.9% |
| Models: Websites | 62 | 1198 | 44% |
| Models: Code | 64 | 1184 | 42.4% |
| Models: SVG | 64 | 1082 | 37.3% |
| Models: UI components | 64 | 1179 | 42% |
| Models: Data visualization | 67 | 1174 | 42.9% |
| Models: Game dev | 69 | 1161 | 38.6% |
| Models: 3D | 76 | 1130 | 40.5% |
Source: Artificial Analysis indexes and Design Arena results as published in OpenRouter’s model data, fetched Oct 15, 2026. Higher is better. Not measured by TokenCenter. See all rankings.