Step-3.7-Flash
stepfun/step-3.7-flash
Step-3.7-Flash is StepFun's flagship high-efficiency multimodal reasoning model, built on a sparse Mixture-of-Experts architecture (198B total / ~11B active parameters) that delivers high throughput and low latency for real-time agentic workflows and high-frequency calls. It natively understands images and video — no extra vision model needed in agent frameworks — and offers a 256K context window with three selectable reasoning levels (low/medium/high) to balance speed, cost and reasoning depth. With reliable multi-step tool calling, task decomposition and plan execution, it excels at coding, solution planning and vision-to-workflow tasks, producing complete plans in a single call.
Features
Serverless API
Docs
stepfun/step-3.7-flash is available via Novita's serverless API, where you pay per token. There are several ways to call the API, including OpenAI-compatible endpoints with exceptional reasoning performance.
Available Serverless
Run queries immediately, pay only for usage
Input$0.2 / M Tokens
Cache Read$0.04 / M Tokens
Output$1.15 / M Tokens
Use the following code examples to integrate with our API:
1from openai import OpenAI
2
3client = OpenAI(
4 api_key="<Your API Key>",
5 base_url="https://api.novita.ai/openai"
6)
7
8response = client.chat.completions.create(
9 model="stepfun/step-3.7-flash",
10 messages=[
11 {"role": "system", "content": "You are a helpful assistant."},
12 {"role": "user", "content": "Hello, how are you?"}
13 ],
14 max_tokens=256000,
15 temperature=0.7
16)
17
18print(response.choices[0].message.content)Info
Provider
StepFun
Quantization
-
Supported Functionality
Context Length
262144
Max Output
256000
Serverless
Supported
Function Calling
Supported
Structured Output
Supported
Reasoning
Supported
Input Capabilities
text, image, video
Output Capabilities
text
Everything you need to build production AI.
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