Step 3.5 Flash

Step 3.5 Flash is available after commercial review or workspace setup.

Model detailAccess reviewDense Transformer

Params

3.5 Flash

Context

128K

Max Output

16K

License

StepFun

API Surface

/v1/chat/completions

Access

Access review

Why pick it

Access is enabled only after workspace setup or commercial review.
Pricing appears only when verified by the live service catalog.

Pricing

TierPublicCachedNote

Realtime$0.035 / $0.15$0.012Current published price

Batch$0.035 / $0.15$0.012Published batch rates appear here when available

Pricing is synced from the live BatchIn catalog.

Quick start

This model is not yet open for public testing. Contact the team for the right access path.

Contact team Open pricing

Python

from openai import OpenAI

client = OpenAI(
    base_url="https://api.batchin.tech/v1",
    api_key="BATCHIN_API_KEY"
)

resp = client.chat.completions.create(
    model="step-3.5-flash",
    messages=[{"role": "user", "content": "Summarize why this model is a fit for my workload"}]
)

print(resp.choices[0].message.content)

JavaScript

import OpenAI from "openai";

const client = new OpenAI({
  baseURL: "https://api.batchin.tech/v1",
  apiKey: process.env.BATCHIN_API_KEY,
});

const resp = await client.chat.completions.create({
  model: "step-3.5-flash",
  messages: [{ role: "user", content: "Summarize why this model is a fit for my workload" }],
});

console.log(resp.choices[0]?.message?.content);

cURL

curl https://api.batchin.tech/v1/chat/completions \
  -H "Authorization: Bearer ***" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "step-3.5-flash",
    "messages": [{"role":"user","content":"Summarize why this model is a fit for my workload"}]
  }'

Specs

Architecture

Dense Transformer

Vendor

StepFun

Context window

128K

Max output

16K

Best for

flash

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