Step 5 Preview API

CN StepFun | publicado 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.visionCódigoRazonamientoInsignia

Precios (oficial, por 1M tokens)

Entrada

$1.04/M

Salida

$2.98/M

Especificaciones

Ventana de contexto256K tokens Modalidades de entradaTexto StreamingSí APICompatible OpenAI

Cómo usar Step 5 Preview

Reemplazo directo de OpenAI. Cambia solo base_url y modelo.

# 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!"}]}'