StepFunPaidOperational
Step 3.7 Flash
API model name: step-3.7-flash
Step 3.7 Flash is StepFun's chat model, served on the Api.Airforce unified API. It is priced at $15.60 per million input tokens and $15.60 per million output tokens. Access it through the OpenAI-compatible API with one key, alongside 100+ other models on Api.Airforce.
Pricing
Specifications
- Provider
- StepFun
- Type
- chat model
Benchmarks
Independent evaluations and measured speed from Artificial Analysis.
Intelligence Index
22.9/100
Coding Index
39.6/100
GPQA Diamond81%
Humanity's Last Exam21%
SciCode44%
τ²-bench99%
τ-bench Banking12%
Terminal-Bench Hard36%
Output speed77.6 tok/s
Time to first token2.23 s
Step 3.7 Flash
Source: Benchmark data by Artificial Analysis (artificialanalysis.ai)
What is Step 3.7 Flash used for?
- Chatbots & assistants — conversational AI, drafting, summarizing and Q&A.
Step 3.7 Flash vs. similar models
| Model | Intelligence | Context | Input / 1M | Output / 1M |
|---|---|---|---|---|
| Step 3.7 Flash | 22.9 | — | $15.60 | $15.60 |
| Step 3.5 Flash | 19.5 | 128K | $0.10 | $0.30 |
| Qwen3.5 122b A10b | 24.8 | — | $0.35 | $2.80 |
| Qwen3.5 397b A17b | 26.1 | — | $0.30 | $1.77 |
Prices are Api.Airforce pay-as-you-go rates per 1M tokens. Context is the maximum input length.
Related models
Step 3.5 FlashStepFun · $0.10 / 1MQwen3.5 122b A10bAlibaba · $0.35 / 1MQwen3.5 397b A17bAlibaba · $0.30 / 1MQwen3.5 PlusAlibaba · $0.21 / 1MQwen3.6 27bAlibaba · $0.53 / 1MQwen3.6 35b A3BAlibaba · $0.40 / 1MQwen3.6 MaxAlibaba · $26.49 / 1MQwen3.6 Max PreviewAlibaba · $1.14 / 1MQwen3.6 PlusAlibaba · $0.58 / 1MQwen3.7Alibaba · $3.87 / 1MQwen3.7 Max PreviewAlibaba · $1.29 / 1MQwen3.7 PlusAlibaba · $0.28 / 1M
Step 3.7 Flash — frequently asked questions
- How much does Step 3.7 Flash cost?
- Step 3.7 Flash is billed pay-as-you-go at $15.60 per 1M input tokens and $15.60 per 1M output tokens. There is no subscription — you only pay for what you use.
- What can Step 3.7 Flash do?
- Step 3.7 Flash is StepFun's chat model, accessible through the Api.Airforce API.
- Is Step 3.7 Flash free to use?
- Step 3.7 Flash is a paid, pay-as-you-go model — no subscription, you are only charged for usage.
- How do I use Step 3.7 Flash via the API?
- Step 3.7 Flash is OpenAI-compatible. Point any OpenAI SDK at https://api.airforce/v1 and pass the model ID step-3.7-flash with your Api.Airforce API key.
- Who makes Step 3.7 Flash?
- Step 3.7 Flash is StepFun's chat model, served through the unified Api.Airforce gateway alongside 100+ other models.
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Use Step 3.7 Flash via the API
OpenAI-compatible — point any OpenAI SDK at https://api.airforce/v1 and pass step-3.7-flash as the model.
cURL
curl https://api.airforce/v1/chat/completions \
-H "Authorization: Bearer $AIRFORCE_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"model": "step-3.7-flash",
"messages": [{ "role": "user", "content": "Hello!" }]
}'Python
from openai import OpenAI
client = OpenAI(base_url="https://api.airforce/v1", api_key="$AIRFORCE_API_KEY")
r = client.chat.completions.create(
model="step-3.7-flash",
messages=[{"role": "user", "content": "Hello!"}],
)
print(r.choices[0].message.content)JavaScript
import OpenAI from "openai";
const client = new OpenAI({ baseURL: "https://api.airforce/v1", apiKey: process.env.AIRFORCE_API_KEY });
const r = await client.chat.completions.create({
model: "step-3.7-flash",
messages: [{ role: "user", content: "Hello!" }],
});
console.log(r.choices[0].message.content);