The comparison that counts is not against the cheapest API on the market: it is against the bill you are already paying. Send your documents to a closed frontier model and you pay by consumption, on a price list you do not negotiate, for a spend that rises with use and has no ceiling — the better the system works, the more it costs, and the project’s success becomes its budget problem. APIs for Chinese open-weight models cost up to ten times less than frontier ones; open weights on hardware you own take the cost per token to zero. What remains is power, maintenance and depreciation: your own lines, and forecastable.
The most expensive line, though, never reaches the invoice. A closed frontier model does not just receive your questions: to answer well it needs your ontology, your processes, your internal documents, the way your organisation decides. That is precisely what sets you apart from the rest, at home and abroad, and to work it has to enter a system you do not administer. Enterprise contracts today exclude training on data sent through the API, and it should be said in full: that is a real, written guarantee. But it is a contractual promise, not an architectural constraint. It changes with an update to the terms, with a change of ownership, with a change of jurisdiction — and from the outside nobody can verify it.
And there is something no contract promises at all. Every euro spent per token builds a capability that stays with whoever sells it: you rent it, you do not accumulate it. After three years the supplier can do one more thing and you have paid some bills. We are paid to create value inside your organisation, not to export it to an outside model: which is why the weights run on machines you staff and oversee, your examples stay yours, and the model that fine-tuning improves is the one you have in house. That is why this page talks about ownership before it talks about price.
Finally, the nature of the spend changes: a capital line you put on the balance sheet, depreciate and forecast, instead of a variable cost set by a price list that can change with an update. We state the limit anyway, because it is real. Measured against the cheapest API in circulation — on DeepSeek’s list, $3,999 buys over 14 billion output tokens — a single desktop machine does not pay for itself. That arithmetic holds for one user and for the lowest price on the market, not for a company sending its documents to a frontier model. The threshold is worked out on your real volume: if it does not add up, we tell you first.