StepFun
StepFun's lightweight image model for unified text-to-image and image editing through Open Platform APIs.
Quick answer
Step Image Edit 2 is concrete enough to track separately because the docs publish endpoints, limits and per-image pricing.
Step Image Edit 2 is StepFun's latest lightweight generation and editing model. The English docs describe it as an under-6B model that supports both text-to-image and image editing, targets 1-2 second response times, supports input images up to 4096x4096 for editing and exposes OpenAI-style image endpoints for generations and edits.
Editorial verdict
Developers testing low-latency Chinese image-generation and image-editing APIs for interactive apps.
Avoid it when you need a mature consumer design studio rather than an API-first image model.
Step Image Edit 2 is concrete enough to track separately because the docs publish endpoints, limits and per-image pricing.
$0.003 per text-to-image or image-editing result
Open Platform balance, API billing
Commercial use should follow StepFun image API terms and content policy for generated or edited images.
Image editing can involve user-uploaded images; review data processing and retention terms before sensitive inputs.
Use it when low-latency prompt-based editing matters more than a full design suite.
Use the /v1/images/generations endpoint for prompt-driven generation in apps.
qwen-image
seedream-image
zhipu-glm-image
minimax-image
Documentation · EN · verified 2026-08-04
Documents capabilities, endpoints, limits, quickstarts and pricing.
Last checked: 2026-08-04
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