> ## Documentation Index
> Fetch the complete documentation index at: https://platform.stepfun.ai/docs/llms.txt
> Use this file to discover all available pages before exploring further.
# Step Image Edit 2
> Unified text-to-image and image editing ยท 1-2 second response, lightweight generation/editing model
StepFun's latest lightweight editing model. A single model supports both **text-to-image** and **image editing**. Within the under-6B parameter range, it sets a performance benchmark in its tier and competes cross-tier with 12B-20B open-source large models. Each editing task takes only 1-2 seconds, redefining real-time interactive image editing.
See official sample prompts and generated results.
View minimal runnable curl examples.
## Key information
Under 6B
Lightweight generation and editing
512 characters
4096x4096
(image editing scenarios)
## Core capabilities
Focused on maximizing performance within the under-6B parameter range. Demonstrates exceptional editing capability, currently the strongest image-editing model at this parameter level.
Optimized architecture for parameter efficiency. With a smaller footprint, it surpasses 12B-20B open-source large models cross-tier. In general editing and reference editing, it matches top-tier closed-source domestic models.
Deep architectural optimization yields a qualitative leap in inference speed: 1-2 seconds per editing task. This near-zero latency removes the long-standing bottleneck of large models in real-time interactive image editing.
## API endpoints
`POST /v1/images/generations`
Generate an image from a prompt.
`POST /v1/images/edits`
Modify an image based on input image and prompt.
## Pricing
| Item | Price |
| :---------------------------- | :------------------ |
| Text-to-image / Image editing | **\$0.003 / image** |
[View full pricing details โ](/en/guides/pricing/details)
## Quickstart
```bash theme={null}
curl https://api.stepfun.ai/v1/images/generations \
-H "Content-Type: application/json" \
-H "Authorization: Bearer $STEP_API_KEY" \
-d '{
"model": "step-image-edit-2",
"prompt": "A serene alpine lake at sunset, mirror reflection, photorealistic",
"response_format": "b64_json",
"cfg_scale": 1.0,
"steps": 8,
"seed": 1,
"text_mode": true
}'
```
Supported sizes for text-to-image: `1024x1024`, `768x1360`, `896x1184`, `1360x768`, `1184x896` (format is `height x width`).
```bash theme={null}
curl -X POST "https://api.stepfun.ai/v1/images/edits" \
-H "Authorization: Bearer $STEP_API_KEY" \
-F 'model=step-image-edit-2' \
-F 'image=@input.webp' \
-F 'prompt=Make the character ride a bicycle, holding a sign that says "Saudi Arabia"' \
-F 'response_format=b64_json' \
-F 'cfg_scale=1.0' \
-F 'steps=8' \
-F 'seed=1' \
-F 'text_mode=true'
```
For image editing, the result image is returned at the same size as the input image.
`text_mode` is an optimization strategy for text-rendering scenarios; off by default, enable as needed. When `cfg_scale = 1.0`, `negative_prompt` is not passed to the underlying model.
## Showcase
### Text-to-image
**Prompt**: A breathtaking wide-angle landscape photograph. A crystal-clear alpine lake serves as a perfect mirror. Towering snow-capped mountains pierce an azure sky dotted with wisps of cloud. On the lakeside slopes, autumn aspens display splendid golden hues. The water reflects mountains, trees and sky with sharp clarity. Hyperrealistic, 8K resolution, National Geographic style, vivid colors, serene atmosphere.
**Prompt**: High-angle cinematic portrait, a young girl standing at a vintage cobblestone street corner during sunset. Long brown hair lifted by the evening breeze, wearing a vintage white floral puff-sleeve dress. Visible details on facial features, hair strands and fabric texture. Subject-centered composition with softly blurred background of old buildings, wooden windows and warm-toned walls as ambiance. Golden-hour sunlight wraps her side profile and shoulders; hair tips and dress edges glow with a faint golden halo. Nostalgic, innocent, quiet summer-evening mood. 35mm film, Kodak Portra 400 tones, soft bloom, shallow depth of field, cinematic portrait, photorealistic.
**Prompt**: A minimalist still-life photograph. Centered: a deep-blue glossy glass vase holding a bouquet of vibrant golden tulips. The vase rests on a textured pale-white tabletop against a pure white wall. Strong afternoon sunlight streams in from the side, casting clear, elongated, artistic shadows of leaves and flowers on the wall. High contrast of light and shadow, pure colors, tranquil and warm atmosphere. High quality, 8K resolution.
**Prompt**: A classical oil-painting still life, Dutch Golden Age style. Center: a transparent glass vase filled with colorful tulips, lilies and purple flowers (orange, pink, purple). Beside it, a white ceramic teapot and exquisite teacups. The dark wooden foreground table is draped with a flowing green-and-white striped silk cloth. Cut lemons, lemon peel, several cups of tea and scattered petals on the tabletop. Background: a deep textured wall, with a butterfly fluttering near the flowers. Soft, delicate light and shadow, rich detail, heavy oil-painting brushstrokes.
### Image editing
**Prompt**: Make the cat lie on its back showing its belly. Add a dialogue bubble next to it that says "I was wrong".
| Input | Result |
| :---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------: | :-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------: |
| 
| 
|
**Prompt**: Change the man into a suit and shirt, and the woman into a beautiful Western wedding dress with a veil. Both face the camera directly.
| Input | Result |
| :-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------: | :-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------: |
| 
| 
|