Image Models
AI-School uses the central model catalog for text-to-image models. Which models are visible depends on the environment's provider settings.
Current catalog
| Provider | Cost-effective | High quality |
|---|---|---|
| OpenAI | GPT Image 1 mini | GPT Image 2 |
| Nano Banana | Nano Banana 2 | |
| Black Forest Labs | FLUX.2 Flex | FLUX.2 Pro Preview |
Nano Banana is the name AI-School uses for Gemini Flash Image models. European image models are provided via Black Forest Labs.
Which model to choose when?
| Model | Suitable for |
|---|---|
| GPT Image 1 mini | Quick concept images, sketches, testing and iteration at lower cost. |
| GPT Image 2 | Tidy final images, clearer text in images and more control over finish. |
| Nano Banana | Quick and affordable visuals, many variants and easy edits. |
| Nano Banana 2 | Smooth image generation and interactive image editing with Google. |
| FLUX.2 Flex | Flexible European text-to-image generation for new, generic images. |
| FLUX.2 Pro Preview | High-quality European image generation for realistic images and consistent style. |
Central format choices
AI-School presents users with four general format choices:
| Choice | Meaning |
|---|---|
| Auto | AI-School selects the best-fitting setting for the chosen model. |
| Square | A square image. |
| Landscape | A wide image, for example for presentations. |
| Portrait | A vertical image, for example for posters. |
In the central model catalog, it is defined how these choices are translated per provider into the correct technical setting. This means a user does not need to know whether a provider works with 16:9, 1536x1024, width/height, or another value.
Editing and inspiration images
Modern image models can also take images as input. AI-School distinguishes between:
- Inspiration images: reference images that guide style, color, composition, or subject.
- Edit images: a source image that the model should modify.
These options do not apply to Black Forest Labs and Stability AI. With these providers, AI-School blocks all source, inspiration, and reference images, and only privacy-constrained text-to-image generation is possible.
In edit mode, the user does not choose any aspect ratio. AI-School then does not send manual dimensions or format settings, allowing the model to preserve the dimensions and aspect ratio of the source image.
Prompt refinement
With direct image generation, AI-School can apply an extra AI step to improve the prompt and automatic settings. This step looks at the current prompt, settings, and recent chat history. Explicitly chosen settings remain authoritative; automatic or empty settings may be supplemented.
For Black Forest Labs and Stability AI, there is a separate technical data flow. They do not receive the original prompt, but only a server-side composed prompt from a controlled catalog. Read how personal data is technically excluded.
