Step 5 Preview

Step 5 Preview is StepFun's flagship model for agentic work, built on a sparse Mixture-of-Experts architecture (27B active / 600B total parameters). It performs strongly in software engineering and professional knowledge work, with particular strength in finance. It is designed for extended tasks that span large codebases and documents, using tools and refining results over multiple steps.

ChatStepfun1M tokens$1.0901 / $2.9432 · 1M

stepfun/step-5-preview

Contexto
1M tokens
Máx. completion
64,000
Tools
Sí
JSON
Sí
Lanzamiento
2026-10-08

Llámalo desde Geek Hub

El mismo SDK de OpenAI. Cambia el base URL y el id del modelo.

curl https://api.geekhub.mx/v1/chat/completions \
  -H "Authorization: Bearer $GEEKHUB_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "stepfun/step-5-preview",
    "messages": [{"role": "user", "content": "Hola"}]
  }'
Consigue tu API key

Preguntas frecuentes

¿Qué es Step 5 Preview?
Step 5 Preview is StepFun's flagship model for agentic work, built on a sparse Mixture-of-Experts architecture (27B active / 600B total parameters). It performs strongly in software engineering and professional knowledge work, with particular strength in finance. It is designed for extended tasks that span large codebases and documents, using tools and refining results over multiple steps. Step 5 Preview corre en el API de Geek Hub (compatible con OpenAI). Id: stepfun/step-5-preview.
¿Step 5 Preview es gratis?
No. El input cuesta $1.0901 / 1M tokens y el output $2.9432 / 1M tokens en Geek Hub (markup incluido).
¿Cuál es el contexto de Step 5 Preview?
Step 5 Preview tiene una ventana de 1M tokens. Soporta hasta 64,000 tokens de completion.
¿Step 5 Preview soporta tool calling y structured outputs?
Step 5 Preview acepta tools y tool_choice para function calling. También soporta structured outputs con un JSON schema en response_format.
¿Cuándo se lanzó Step 5 Preview?
Step 5 Preview se lanzó el 8 de octubre de 2026.

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