Generation models & creativity
Pick the model that builds your app — Free, Efficient, Balanced, or Best — and tune how adventurous it is.
Every app is built by a model, and you choose which one. The model chip sits in the composer next to the + button. Click it to open the picker.
Each option carries three ratings — Value, Speed, and Quality — so you can weigh the trade-off at a glance. Your choice is remembered per app.
The models
| Model | Best for | Notes |
|---|---|---|
| Free | Everyday builds | The default, and the quality baseline. No credits. |
| Efficient | Faster iteration | Free's quality, but quicker — spends credits for speed. |
| Balanced | Higher-quality work | A genuine step up in quality. Spends credits. |
| Best | Your most ambitious builds | Highest quality, for complex or polished apps. Spends credits. |
Start on Free — it's the quality baseline and costs nothing. Efficient doesn't build better than Free; it builds faster, trading credits for speed. When you need higher quality — the logic is off, or the result isn't polished enough — step up to Balanced or Best, then drop back down for routine tweaks.
The model behind each name
The names describe the trade-off, not the vendor. Fuser maps each tier to a capable underlying model and may update that mapping over time — so you always get a strong model for the job without tracking vendors or versions yourself.
Creativity
Below the model, a Creativity slider controls how adventurous the agent is. Lower values keep it precise and predictable; higher values invite more invention and surprise. For functional tools, keep it low. For expressive, visual, or playful apps, nudge it up.
Some reasoning-focused models run at a fixed setting — when that's the case, the slider is disabled.
When a model is unavailable
If the model you picked is temporarily down or rate-limited, Fuser tells you it couldn't be reached. Try again in a moment, or switch to another model and continue — your app and history are untouched.