Subscription or pay-as-you-go: which AI pricing is cheaper for you?

Per seat is predictable, and paid for everyone

A subscription per seat means a fixed price for each person each month, whatever they do with it. You can budget it to the dollar, and nobody hesitates to use the tool because an answer costs money. The catch is that you pay for every seat, including the people who tried it twice and drifted away.

Take a tool at thirty dollars a seat, bought for two hundred people, where only eleven use it each week. That is an expensive tool, because you pay for two hundred seats and get value from eleven. Seats suit a tool that a defined group will use often, such as an assistant for the office team.

Per use is cheap to start and moves with volume

Pay-as-you-go means you pay for what runs: a call minute, a conversation, a document or a token, which is the small chunk of text a model reads or writes. It is cheap while you experiment, because a quiet month costs little. It moves with volume, which is fine until a new workflow sends ten times the traffic and the bill follows.

This shape suits tools whose use is uneven, such as a phone assistant that handles few calls in a slow week and many in a busy one. It also needs watching. A cost you cannot see is a cost you cannot control.

What decides which is cheaper

Three things decide it: how many people use the tool, how often they use it, and how much work goes through it. A few people using a tool all day may cost less on seats than by use. Many people using it now and then may cost less by use. And a tool handling a growing flow, such as customer calls or documents, can outgrow a price that looked small.

What to do this week

Write down three numbers for the tool you are considering: how many people will use it each week, how often, and how much volume it will handle in your busiest realistic month, not the average one. The average is not the month that causes the phone call. If the vendor offers both shapes, price each against those numbers.

Then ask for a cap and for an alert before the limit rather than after. Work out cost per useful answer: what you will really pay in a year divided by how many times the tool will genuinely be used. Include the costs the quote leaves out, such as connecting the tool, cleaning documents, training and the owner's time, and ask what the price is in year two.