Which AI model should you pick? From fast tests to premium 4K

AI Formule gives you several models for photo and video, not because more is always better, but because every job asks for something different. The sharpest, most expensive model is a waste of credit when you just want to test an idea. And the fastest model disappoints when you need a final result in 4K. The trick is simple: match the model to the task. Because you pay per render, you pay exactly for what each job needs.

Why model choice matters when you pay per use

With a subscription it doesn't matter which model you grab: you've already paid. When you pay per render it's different. A fast model costs less per image, a premium 4K model costs more. Test cheaply first and finish premium only at the end, and your credit lasts far longer.

• Testing costs little, delivering may cost a bit more.
• You don't waste premium renders on variants you'll throw away anyway.
• You choose on purpose, instead of defaulting to the heaviest model.

Photo: which model for which job

All the photo models do the same basic work, but each has a strong point.

• Fast testing and many variants: grab a fast, affordable model (like Nano Banana or Seedream 4.5) to explore composition, pose and mood before you go for the final.
• Text in the image: posters, packaging or multilingual text? Nano Banana Pro renders legible text where older models turn it into gibberish.
• Tight instruction-following: when an exact layout, pose or spatial arrangement has to be right, GPT Image 2 follows detailed directions most accurately.
• Sharp detail and many references: Seedream 4.5 delivers crisp detail and handles multiple reference images at once for a consistent look.

Need print or a large format? Render your chosen image at the highest setting. For the testing phase that's rarely necessary.

Video: quick test or premium delivery

With video the difference is mostly in resolution, motion and sound.

• Fast, affordable iteration: for short clips and to try out motion, grab a faster, cheaper model (like WAN 2.2). Perfect to see whether your concept works.
• Premium final result: if you want 4K, smooth motion and even lip-synced audio, deliver with Kling 3.0 Pro. It costs more per second, but the result is broadcast-ready.

Both also work with image-to-video: start from a good photo and describe the motion in the video generator.

A smart workflow: test cheap, deliver premium

1. Write a sharp prompt. Not sure how? Let the prompt generator turn your idea into a complete description.
2. Test with a fast, affordable model until composition and mood are right.
3. Pick your best variant and re-render it with a premium model at the highest quality.
4. Need it even bigger? Scale the final image up with the upscaler instead of generating everything again.

Rules of thumb

• Testing phase → fast and affordable. Final result → premium.
• Text in the image → Nano Banana Pro. Exact instructions → GPT Image 2.
• Short clip to try things out → fast video model. 4K with audio → Kling 3.0 Pro.
• You can enlarge later; don't generate everything in the heaviest mode from the start.

You don't need to know upfront which model is perfect. Start cheap, see what works, and only go premium when the result is worth it. That's how you get more out of every euro of credit.

Want to try it yourself? Create an account and compare the models in the photo generator and the video generator.