You tap regenerate like it's a cheap retry. The last answer sits there, almost right, and the button looks like an eraser. It isn't. That click does not nudge a sentence. It throws the whole run away and starts over.
This is the part the interface hides. A finished reply feels like an object you could edit. Under the hood it is a path of token-by-token guesses that already happened. Regenerating does not rewind two words. It re-opens the same prompt, with the same model, and predicts every token again from a blank start.
That is why the second answer can change. The model is sampling a path, not retrieving a filed document. A new path can land in a different wording, a different order, even a different claim — and still arrive with the same smooth confidence. Confidence is not a leftover from the first pass. It is produced again, because the system is built to produce an answer, not to remember that you already got one.
The cost is the same story. One click looks tiny. Behind it, the machine lights the network from a cold start. Nodes that were done have to work again. Tokens stream through from the first position, not from the almost-right middle. You do not see the electricity, the hardware, or the repeated work. You see a spinner, then a new paragraph that feels free.
None of this is a glitch. Regenerating is a full recompute by design. If you want a small tweak, you have to ask for a small tweak. If you hit regenerate, you are paying for the entire run a second time — and you are rolling the dice on a new path that can look just as sure of itself as the last one.
So the job of catching it is still yours. The button will not tell you it started from zero. The new answer will not blush. It will just answer.
Did you know that click restarts the entire computation?
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