Force accuracy-optimized sampling settings on a specific model by appending the :exacto suffix.
Not yet available.
The :exacto variant runs a chosen model with sampling parameters tuned for maximum output accuracy — lower temperature, tighter top-p, and conservative decoding. Append :exacto to any eligible model slug to activate it without manually tweaking temperature or top_p.
When you append :exacto, OpenDunes applies a fixed accuracy preset before forwarding the request:
| Parameter | Default | Exacto preset |
|---|---|---|
temperature | 1.0 (model default) | 0.2 |
top_p | 1.0 | 0.85 |
presence_penalty | 0 | 0 |
Any explicit temperature or top_p you pass in the request body are overridden by the exacto preset. If you want custom sampling while using this variant, use the standard model slug and set the parameters yourself.
Use :exacto for tasks where precision matters more than creativity:
For creative writing, brainstorming, or open-ended generation, the standard variant gives more varied and interesting output.
These are different features:
| Feature | What it does |
|---|---|
:exacto suffix | Applies accuracy-tuned sampling to a specific model you chose |
| Auto Exacto router | Picks the most accurate model from the catalog automatically |
Use :exacto when you already know which model you want and just want to lock in precision settings. Use Auto Exacto when you want OpenDunes to pick the model for you.
The :exacto variant has no price premium — you pay the same per-token DA rate as the standard variant of the same model. It only changes sampling settings, not which provider serves the request.