LUVI Prompt Engine

Every AI model reads a prompt by its own rules: wording that works on one model is wasted on another, and can even make the result worse. LUVI Prompt Engine uses the prompt guides LUVI has written for twenty-one model families to adapt your prompt to the model you've picked.

In the workspace, it lives in the feather button next to the Prompt heading, and it's called LuviTransLex. If the model you've picked has a guide, the feather gently pulses; for models without one, it stays dim.

Click the feather to open a panel that checks your prompt against that model's guide as you type. The check runs in your browser and costs no credits.

Here, the model is HappyHorse, and the panel has found three things. The turquoise lines are corrections: HappyHorse doesn't understand weighting syntax, so the brackets and the number go and the words stay. Tags like "masterpiece" do nothing on this model either, so they're removed.

Click a line to apply just that fix, or use the button at the bottom to apply them all at once.

Yellow lines are warnings, and they aren't fixed for you. This one says the aspect ratio doesn't belong in the prompt: you set it in the parameters.

To go a step further, turn on the Haiku switch and click Rewrite with Haiku. Haiku, an AI model, rewrites your prompt from scratch following the guide, and the result is in English, whatever language you typed in.

It keeps what you described and only reshapes it the way the model wants. HappyHorse clips come back almost silent unless the prompt asks for sound in words, so Haiku added an audio line at the end, and took out the aspect ratio too.

If you like the result, click Apply to prompt; if not, discard it. Your prompt only changes when you apply something: press Generate, and whatever is in the box is what gets sent. The rewrite costs no credits either.

Prompt Engine also works behind the scenes. When LuviBot prepares a generation, it reads the model's prompt guide first and then checks the prompt, and in workflows the fixes are applied automatically just before each generation.

Connect LUVI to an AI assistant such as Claude or ChatGPT, and the assistant uses the same guides. And if you're curious about a model's rules, you can read its family's prompting guide on the Models page.

Finally, we pressed Generate with Haiku's prompt. Here's the clip HappyHorse made, and thanks to that audio line, it has sound too.

In short: pick your model, click the feather and apply the fixes, and if you like, let Haiku rewrite the whole thing. In the next video, we'll look at editing your images.