Step 3.7 Flash API

CN StepFun | publicado 2026-10

Step 3.7 Flash is StepFun’s flagship multimodal reasoning model on a 198B-total / 11B-active sparse MoE architecture, with native image input and fast responses. Strong on reasoning-heavy multimodal tasks at a price well below Western frontier models.

cap.visionRazonamientoRápido

Precios (oficial, por 1M tokens)

Entrada

$0.20/M

Salida

$1.20/M

Especificaciones

Ventana de contexto256K tokens Modalidades de entradaTexto StreamingSí APICompatible OpenAI

Cómo usar Step 3.7 Flash

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-3.7-flash",
    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-3.7-flash","messages":[{"role":"user","content":"Hello!"}]}'