StepFun API model

StepFun: step-3.7-flash

StepFun step-3.7-flash — fast 256K-context multimodal reasoning model with vision input, tool use, and OpenAI-compatible chat completions.

Start free — $2 credit View live pricing

Specs

Pricing and API details.

Transparent USD pricing. No mainland-China account or phone required. Token-model rates are synchronized from the gateway and may follow providers' official China list prices where configured. Live pricing is authoritative.

Context window

256K

Modalities

Text, image input

Input $/1M

$0.1875

Output $/1M

$1.125

Endpoint

OpenAI-compatible /v1/chat/completions

About step-3.7-flash

StepFun step-3.7-flash — fast 256K-context multimodal reasoning model with vision input, tool use, and OpenAI-compatible chat completions.

Pricing

Transparent USD pricing.

step-3.7-flash

$0.1875/M input, $1.125/M output tokens. Paid in USD. Token-model rates are synchronized from the gateway and may follow providers' official China list prices where configured. Live pricing is authoritative. View live pricing

Quickstart

Copy-paste API request.

curl -X POST https://api.chinaapi-ru.com/v1/chat/completions \
  -H "Authorization: Bearer sk-..." \
  -H "Content-Type: application/json" \
  -d '{
    "model": "step-3.7-flash",
    "messages": [
      {"role": "user", "content": "Summarize the main tradeoffs for this API workload."}
    ]
  }'

from openai import OpenAI

client = OpenAI(
    api_key="sk-...",
    base_url="https://api.chinaapi-ru.com/v1",
)

response = client.chat.completions.create(
    model="step-3.7-flash",
    messages=[
        {"role": "user", "content": "Summarize the main tradeoffs for this API workload."}
    ],
)
print(response.choices[0].message.content)

Internal links

Related model pages and guides.

Model directoryBrowse all models Live pricingCurrent dashboard pricing ChinaAPI integration guidesOpen guide stepaudio-2.5-tts$0.8056 per 10k characters step-tts-2$0.3889 per 10k characters step-tts-mini$0.125 per 10k characters stepaudio-2.5-asr$0.0208 per audio hour

How do I use step-3.7-flash?

Use step-3.7-flash through ChinaAPI with an API key and the OpenAI-compatible endpoint shown above.

How much does step-3.7-flash cost?

step-3.7-flash is $0.1875/M input, $1.125/M output tokens, paid in USD. The live pricing page is authoritative. Token-model rates are synchronized from the gateway and may follow providers' official China list prices where configured. Live pricing is authoritative.

Does step-3.7-flash need a Chinese account?

No. ChinaAPI provides access without a mainland-China account or phone number and includes a $2 free trial. Check live pricing for the displayed USD rate.