Step 5 Preview API

CN StepFun | 发布 2026-10

Step 5 Preview is StepFun’s new-generation flagship base model for real-world tasks, focused on programming and professional knowledge work. It natively accepts text, image and video input, making it a versatile single model for multimodal understanding at frontier quality.

cap.vision代码推理旗舰

定价（官方，每百万token）

输入

$1.04/M

输出

$2.98/M

规格

上下文窗口256K token 输入模态文本流式是 APIOpenAI兼容

如何使用Step 5 Preview

直接替换OpenAI。只需改base_url和模型。

# Python - pip install openai
from openai import OpenAI

client = OpenAI(
    base_url="https://meshtok.com/v1",
    api_key="sk-your-MeshTok-key",
)

resp = client.chat.completions.create(
    model="stepfun/step-5-preview",
    messages=[{"role":"user","content":"Hello!"}],
)
print(resp.choices[0].message.content)

# cURL
curl https://meshtok.com/v1/chat/completions \
  -H "Authorization: Bearer sk-your-MeshTok-key" \
  -H "Content-Type: application/json" \
  -d '{"model":"stepfun/step-5-preview","messages":[{"role":"user","content":"Hello!"}]}'