You picked the GPU. This tells you where to rent it. Spot and on-demand prices for every EC2 instance type, compared across every region, with 7-day history — and every price names the availability zone it came from, because you launch into a zone, not into a region.
Still deciding which instance you need? → EC2 Instance Advisor weighs vCPU, memory, GPU and network against your priorities. This page picks up where that one leaves off.
availability: unknown AWS publishes no availability, so no row here claims any. This compares price only. Why — and what “price moves” is instead
This is a snapshot, not a live view. These prices were read at 2026-07-31 02:24 UTC and written to a static page. Spot prices move continuously, so read every number as “what was true then”. Nothing here updates by itself.
For live data, clone the repo and run it against your own AWS account —
uv run python scripts/serve.py --backfill.
AWS will not sell you a spot instance for less than a tenth of its on-demand price. Bid theory says a spot price should fall until demand meets supply. It doesn't. It falls to 10% of list and stops dead — no matter how idle the capacity, how unfashionable the instance, or how empty the region. That wall is the spot floor, and it is what this tool is named after.
It is not a rule AWS publishes. It is one you can see, which is why the numbers beside this paragraph are measured on the 15,277 rows currently in the table rather than quoted from anywhere:
Why it matters when you are picking a GPU. A row at the floor is at its structural minimum: waiting will not make it cheaper, and the only way to pay less is to launch the same hardware somewhere else. A row well above the floor has room to fall — and room to rise. Sort by Saves to see which is which.
| sa-east-1 | 21% | 154/741 |
| ap-northeast-3 | 13% | 53/420 |
| ap-northeast-2 | 10% | 74/750 |
| ap-south-1 | 9% | 72/793 |
| eu-west-3 | 7% | 47/660 |
The floor applies at every price point — even p5.48xlarge in ap-south-1: $6.60/hr against $66.05 list.
unknown, and what “price moves” measuresAWS does not publish spot availability. The nearest thing, Spot Placement Score,
is computed against the calling account's quota and history — so a score
fetched with this app's credentials describes that account, not your odds of getting
capacity. spotfloor does not call that API and reports unknown rather
than inventing a number. This is a price comparator; it does not claim to
know what you can get.
“Price moves” is not availability either. It counts how many times the price changed in the window — a real fact from AWS's published history and a fair hint that a zone is contended. It is not a fulfillment probability.
17 AWS regions are not enabled on this account, so they cannot be priced and are absent from the table — not because they have no capacity, but because we were never able to ask: af-south-1, ap-east-1, ap-east-2, ap-south-2, ap-southeast-3, ap-southeast-4, ap-southeast-5, ap-southeast-6, ap-southeast-7, ca-west-1, eu-central-2, eu-south-1, eu-south-2, il-central-1, me-central-1, me-south-1, mx-central-1. Opting a region in is an account-level change, made in the AWS console under Account → AWS Regions.
| Plot | Instance ↕ | Region ↕ | $/hr? ↑ | Cheapest zone? | On-demand? ↕ | Saves? ↕ | AZ spread? ↕ | Spec? | $ per GPU? ↕ | Price moves? ↕ | Last 7d? |
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