Pricing
Start with €5 on us.
Confirm your email and €5 lands in your account. Top up €10 later and we'll add another €5. No card to start, no subscription, ever.
How far €5 goes
You pay for what you use, not per request. A short question costs a fraction of a cent; a long report costs more. Roughly:
~1,000
quick asks
Questions, rewrites, short pieces of text
~200
real work
Analyses, drafts, longer answers
~40
heavy lifting
Documents, reports, a lot of context
Ballpark figures, not a promise. The real cost of every request is shown next to its answer.
When you need more
Top up whatever you like. Credit never expires and isn't tied to a plan.
€10
+ €5 bonus on your first top-up
€25
Most people land here
€50
For daily use
Building something of your own? The same access is available through the API, on the same credit, with no base fee.
Questions
What can I do with the €5?
Everything. Nothing is locked behind a paid tier and no trial runs out — the credit only goes down when you actually use it.
Do I need a card to start?
No. Confirm your email address and the credit is yours. A payment method only comes up if you decide to top up later.
Which AI model is behind it?
Several. CALEST picks the one that fits each task. You can see which one answered, but you never have to choose.
Is this just another chatbot?
No. CALEST takes the outcome you want, settles what's missing first, and only then does the work. The difference shows most when a request is incomplete.
Does it make things up?
Less. Specific claims have to come from something you provided, and assumptions are shown rather than quietly made. It's still a language model — check anything that matters.
What happens to what I type?
It's used to do your work and kept with your account so you can find it again. It is never sold or handed to anyone for training.
Building with the API? The documentation covers the technical side.