B300 spot prices

Spot is capacity nobody is using right now, sold for less. The condition is that the provider can reclaim the machine when a full-price customer wants it. Notice is short, sometimes seconds.

The discount is the price of that risk. It is real money off, for a machine you may lose in the middle of a job.

Spot exists where machines sit idle. How many sit idle changes by the hour, and a provider with few B300s has few to spare. So a spot listing for this card can vanish from one day to the next.

When you see one, read it as a note about that provider on that day. It says little about what the card costs elsewhere.

Spot suits work that can stop and resume: a batch job, or a training run that saves checkpoints often. When the machine is taken, you restart from the last checkpoint and lose the work since.

It does not suit anything that serves users. A model behind an API cannot disappear in the middle of a request. For that work the spot price is not an option, however low it is.

Compare spot only with spot. Then add the cost of interruptions: the work lost each time, and the minutes spent starting again. On a card as expensive as the B300, an hour of lost work is not small.

The tables on this site list on-demand prices. On 12 Nov 2026, the median listed on-demand B300 price was $9.50 per GPU-hour. That is the figure a spot price has to beat after its interruptions are counted.

Runcrate sells on-demand GPUs. Billing is by the second on most GPUs, a few by the minute, and booting is never billed. So short and uneven work, the usual reason to look at spot, is billed for the time it ran.

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