Several models, one chat
Open-weight and premium models behind a single conversation.
OpenUno Chat · Early access
Free AI chat that picks the right model for you
Ask anything in the browser. OpenUno Chat routes each question to a model that answers it well, so free can stay free.
Features
Everything you need, nothing you pay for
Smart routing
Each question goes to a model that answers it well, at the lowest sensible cost.
Free, with fair limits
Generous free use for everyone. Limits keep it sustainable, not to push upgrades.
Bring your own keys
Already pay a provider? Use your key and your limits apply instead of ours.
In your language
Portuguese, English and Spanish first. More languages as we grow.
Private by default
Your conversations are never sold and never become someone else’s dataset.
Try it
See how a question finds its model
Translate “good morning, class” into Portuguese and Spanish.
OpenUnoRouting…
Router3 candidates · Auto
- Small open-weight modelFast, very low cost78
- Large open-weight modelStrong, low cost77
- Premium reasoning modelBest quality, highest cost42
- Your own keyNot configured for this request—
Illustration of the routing idea. Scores are a toy model, not benchmarks, and no model is called.
Questions
Frequently asked
Is OpenUno Chat really free?
Yes. Everyone gets free use within fair limits. Routing simple questions to efficient models is what lets us keep it free. Researchers, students and everyone else never pay for chat. Only Enterprise company teams and the API are paid.
Which models does it use?
A mix of open-weight models and premium models. The router chooses per question; you can see which tier answered every message.
What happens to my conversations?
They are used to run the service for you. They are not sold, rented or turned into datasets. Anything beyond that would be opt-in, for one stated purpose, and revocable.
Can I use it at school?
Yes. OpenUno Education adds class workspaces and safe defaults for schools and universities.
AI that belongs to everyone.
Start free in the browser, or help shape the open-source core. Schools, partners and teams: we would love to hear from you.