Step 5 Preview

step-5-preview by StepFun Released October 9, 2026

ReasoningFunction callingStructured outputPrompt cachingWeb searchComputer useImage inputFile inputAudio inputVideo inputEU hostingFree endpointUp to % off

Input from

$1 / 1M

Output from

$2.7 / 1M

Cached input from

$0.1 / 1M

Context window

1.05M

Endpoints

from 1 providers

Regions

États-Unis

About Step 5 Preview

Step 5 Preview est le modèle phare de StepFun pour les tâches agentiques, basé sur une architecture « Mixture-of-Experts » clairsemée (27 milliards de paramètres actifs / 600 milliards de paramètres au total).

Step 5 Preview est un modèle conversationnel développé par StepFun, disponible sur Eden AI via 1 endpoint chez 1 fournisseur, à partir de 1 $ par million de tokens en entrée et 2,7 $ par million de tokens en sortie, avec une fenêtre de contexte allant jusqu'à 1,05M tokens.

Providers and prices

1 endpoints from 1 providers, cheapest first, in USD per million tokens. Every one is called with the same Eden AI key: pin one with its endpoint ID, or let Eden AI route for you. .

Endpoint

Region

Context

Input / 1M

Output / 1M

Cached / 1M

Supports

DeepInfra (États-Unis)Official−%deepinfra/stepfun-ai/Step-5-Preview

États-Unis

1.05M

$1$1

$2.7

$0.1

ReasoningToolsJSONCacheVisionWeb

Performance

Performance figures appear here once Step 5 Preview has enough traffic on Eden AI to report them without exposing any single customer.

Estimate your monthly cost

Enter your expected volume to compare every endpoint at once.

Call Step 5 Preview with Eden AI

Use the model ID to let Eden AI pick an endpoint, or an endpoint ID from the table above to pin one.

import requests

response = requests.post(
    "https://api.edenai.run/v3/chat/completions",
    headers={"Authorization": "Bearer YOUR_EDENAI_API_KEY"},
    json={
        "model": "",
        "messages": [{"role": "user", "content": "Hello!"}],
    },
)
print(response.json())

curl https://api.edenai.run/v3/chat/completions \
  -H "Authorization: Bearer YOUR_EDENAI_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model": "", "messages": [{"role": "user", "content": "Hello!"}]}'

const response = await fetch("https://api.edenai.run/v3/chat/completions", {
  method: "POST",
  headers: {
    Authorization: "Bearer YOUR_EDENAI_API_KEY",
    "Content-Type": "application/json",
  },
  body: JSON.stringify({
    model: "",
    messages: [{ role: "user", content: "Hello!" }],
  }),
});
console.log(await response.json());

Questions about Step 5 Preview

How much does Step 5 Preview cost?

On Eden AI, prices for this model start at $1 per million input tokens and $2.7 per million output tokens. Prices differ by endpoint; the providers table lists each one. .

What is the context window of Step 5 Preview?

Up to 1.05M tokens, depending on the endpoint.

Which providers serve Step 5 Preview?

1 endpoints from 1 providers, available in: États-Unis. All of them are called with the same Eden AI API key.

Can I run Step 5 Preview in the EU?

Yes. At least one endpoint is hosted in Europe; pin it with its endpoint ID from the providers table to keep requests in the EU.

How fast is Step 5 Preview?

Over the last 30 days, the fastest first token was s () and the highest throughput was tokens per second ().