step-2x-large and step-image-edit-2 will be retired on October 10, 2026; step-1x-edit is no longer available. The text-to-image, image-to-image, and image editing APIs will stop serving requests. See the image model retirement notice.Model overview
Our text-to-image models generate high-quality, diverse images from text prompts or other inputs. They are widely applicable for art, design, game development, and beyond. We currently provide the step-1x and step-2x model series:Models
step-2x-large
Our new-generation image model focused on text-to-image generation. Produces more realistic textures and stronger Chinese/English text rendering.Key terms
- Image resolution: Pixel width/height of the output. Higher resolution gives more detail but increases generation time and compute.
- Image style: Visual characteristics such as realistic, abstract, cartoon, etc.
- Prompt/description: The text or reference image describing what to generate. More precise descriptions yield outputs closer to expectations.
- Model parameters: Larger models capture more detail and produce higher-quality results. The step-1x line offers a 2B-parameter model.
Usage limits
- Supported input: Natural-language descriptions of desired content and style.
- Images per request: step-1x models allow up to 1 image per request.
- Resolution limits: Squares:
256x256,512x512,768x768,1024x1024; 16:9:1280x800,800x1280. - Generation time: Varies with prompt complexity and model throughput.
- Quality: Results depend on prompt specificity and training data; multiple attempts may be needed for the best output.
- Copyright and usage: You own generated images but must not use them for illegal purposes or rights violations. Models are evolving, so evaluate and adjust for your scenario.