StepFun API model

StepFun: step-image-edit-2

StepFun Step Image Edit 2 — unified text-to-image and image-editing model under 6B parameters that completes an edit in one to two seconds, built for low-latency interactive retouching. Supports negative prompts and a text-optimization mode; one image per request over the OpenAI-compatible images endpoint.

Start free — $2 credit View live pricing

Specs

Pricing and API details.

Transparent USD pricing. No mainland-China account or phone required. The displayed media rate may include a service margin covering provider input/output billing, payment processing, chargeback exposure, and operations. Any margin is included in the displayed rate and is not added separately.

Type

Image generation

Capabilities

Image, Image Editing, Fast

Billing

$0.0035 per image

Endpoint

/v1/images/generations

About step-image-edit-2

Pricing

Transparent USD pricing.

step-image-edit-2

$0.0035 per image. Paid in USD. The displayed media rate may include a service margin covering provider input/output billing, payment processing, chargeback exposure, and operations. Any margin is included in the displayed rate and is not added separately. View live pricing

Quickstart

Copy-paste API request.

curl -X POST https://api.chinaapi.ai/v1/images/generations \
  -H "Authorization: Bearer $CHINAAPI_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "step-image-edit-2",
    "prompt": "A clean product hero image with controlled lighting"
  }'

Internal links

Related model pages and guides.

Model directoryBrowse all models Live pricingCurrent dashboard pricing Image API access guideOpen guide step-3.5-flash256K context, $0.1/M input, $0.3/M output tokens step-3.5-flash-2603256K context, $0.1/M input, $0.3/M output tokens step-1o-turbo-vision32K context, $0.4/M input, $1.28/M output tokens step-2x-large$0.0155 per image

How do I use step-image-edit-2?

Use step-image-edit-2 through ChinaAPI with an API key and the OpenAI-compatible endpoint shown above.

How much does step-image-edit-2 cost?

step-image-edit-2 is $0.0035 per image, paid in USD. The live pricing page is authoritative. The displayed media rate may include a service margin covering provider input/output billing, payment processing, chargeback exposure, and operations. Any margin is included in the displayed rate and is not added separately.

Does step-image-edit-2 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.