AI Rate Card

Step 5 Preview · vercel

Step 5 Preview is StepFun’s flagship AI model for agentic coding, professional knowledge work, and financial analysis. Built on a sparse Mixture-of-Experts architecture with 600B total parameters and 27B active per token, it combines a 1M-token context window with vision input. From building interactive applications and debugging code to conducting research and producing analytical reports, it supports complex workflows that require sustained reasoning, tool use, and iterative refinement.

Modelo baseTodos los modelos de esta baseTodos los modelos del proveedoral proveedor

Todos los modelos de StepFun en todos los proveedores

Entrada, $/1M $1.00

Salida, $/1M $2.70

Lectura de caché $0.10

Escritura de caché —

Contexto 1 048 576

Salida máx. 1 048 576

Acepta imágenes, texto, vídeo

Última comprobación 04.11.2026 12:00:14 UTC

Fuente página del proveedor

Alertas de precio

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API

API compatible con OpenAI: los SDK oficiales de OpenAI funcionan con esta URL base. Sustituye YOUR_API_KEY por tu clave del proveedor.

URL base de la API
https://ai-gateway.vercel.sh/v1
Endpoint
https://ai-gateway.vercel.sh/v1/chat/completions
ID del modelo
stepfun/step-5-preview
curl
curl https://ai-gateway.vercel.sh/v1/chat/completions \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model": "stepfun/step-5-preview", "messages": [{"role": "user", "content": "Hello!"}], "max_tokens": 256}'
Python
import requests

r = requests.post(
    "https://ai-gateway.vercel.sh/v1/chat/completions",
    headers={"Authorization": "Bearer YOUR_API_KEY"},
    json={
      "model": "stepfun/step-5-preview",
      "messages": [
        {
          "role": "user",
          "content": "Hello!"
        }
      ],
      "max_tokens": 256
    },
)
print(r.json())
JavaScript
const r = await fetch("https://ai-gateway.vercel.sh/v1/chat/completions", {
  method: "POST",
  headers: {Authorization: "Bearer YOUR_API_KEY", "Content-Type": "application/json"},
  body: JSON.stringify({
    "model": "stepfun/step-5-preview",
    "messages": [
      {
        "role": "user",
        "content": "Hello!"
      }
    ],
    "max_tokens": 256
  }),
});
console.log(await r.json());
Solicitud (JSON)
{
  "model": "stepfun/step-5-preview",
  "messages": [
    {
      "role": "user",
      "content": "Hello!"
    }
  ],
  "max_tokens": 256
}
Respuesta (JSON)
{
  "id": "chatcmpl-...",
  "object": "chat.completion",
  "model": "stepfun/step-5-preview",
  "choices": [
    {
      "index": 0,
      "message": {
        "role": "assistant",
        "content": "Hi! How can I help?"
      },
      "finish_reason": "stop"
    }
  ],
  "usage": {
    "prompt_tokens": 9,
    "completion_tokens": 12,
    "total_tokens": 21
  }
}

La dirección se toma de la lista de modelos del proveedor; compruébala con su documentación.

Documentación de la API del proveedor

Source: AI Rate Card, https://airatecard.com/es/c/offer%3Avercel%7Cstepfun/step-5-preview, prices checked 2026-11-04; seller's page: https://vercel.com/ai-gateway/models/step-5-preview

Datos técnicos

ID: offer:vercel|stepfun/step-5-preview