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Bench log: the rental cost of hash entry (as cut for the site in 8e6de32)

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Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
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igneum-labs 2026-10-06 19:48:09 +00:00
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@ -1995,3 +1995,22 @@ case of the prover-floor gate, on the 3080); the miner beside a prover costs 1.7
time and 5 to 20% of the miner's rate; the empty-shard fixture (block-72854, a first block with a genesis witness) proves
slower than the v1 shard on every card (24 to 55 s) and is not an empty live shard; Ember's two knobs are refused in the
containers, so the ladders are baseline rows (`docs/plans/ember-tune.md`, fleet priors).
## Rental cost of hash, 6 October 2026 (branch gpu-fleet): what a GH/s costs by the hour against the devnet
Measured on the rented fleet (RunPod community pods, list prices, 18:45Z): 38 wave pods (4090, A4000, L4, 3090, 3070, 4070 Ti,
A5000, 4000 Ada) ran 1,748 MH/s inside jobs (median pod 28 MH/s) for USD 20.44 an hour, USD 0.0117 per MH/s-hour; the 8x 4090 rig
459 MH/s at 1,636 W for USD 5.92 an hour, USD 0.0129 per MH/s-hour; a single 5090 pod 98 to 128 MH/s for USD 0.41 to 0.74 an hour.
The live devnet's difficulty read 1,156,040,186 at 1 block a second at 19:00Z, so the whole network was about 1.16 GH/s, and the
rented fleet was most of it. The live litepaper's line ("2 GH/s for USD 13/h vs 280 MH/s devnet") is corrected to: 1.75 GH/s for
USD 20 an hour on community pods, against a devnet of 1.16 GH/s.
| Buyer | What USD 20/h buys | Against the devnet (1.16 GH/s) | Against mainnet scale |
|---|---|---|---|
| Home miner, 8 to 12 GB card (11 to 28 MH/s) | nothing: the card is owned, 0.15 to 0.2 kW | one card is 1 to 2 percent of the devnet | one card is noise at a TH/s |
| Rig, 8x 4090 (459 MH/s, USD 5.92/h rented) | 1.7 rigs | one rig is 40 percent of the devnet | one rig is 0.05 percent of a TH/s |
| Renter at RunPod list prices | 1.75 GH/s while cards exist | 150 percent of the devnet: overtaken for USD 15/h | a TH/s costs USD 11,700 an hour and the market cannot supply it: asked for 20 pods of any of 8 card types at 18:59Z to 19:15Z, RunPod gave 0 ("no instances currently available") |
Consequence: the devnet's hash is rentable for the price of a dinner, so nothing on it is a security result; the counter-ASIC and
finality work is tested there for correctness, not for cost. The cost argument only starts at the TH/s scale, where the rental
market's supply (not its price) is the limit, and that number belongs in the litepaper with this caveat.