

GPU specialist against peer marketplace, priced against each other on the 5 GPUs both of them rent. Published per-GPU on-demand rates as each provider last stated them, with what their own pages say about billing, commitment and egress beside the numbers.
Massed Compute is cheaper on 3 of the 5 cards both of them rent, by a median of 7%. Spheron is cheaper on the other 2.
These are not the same product. A GPU specialist and a peer marketplace differ in who your counterparty is, which is why the rates below can be far apart without either being wrong. The prices are comparable; what stands behind them is not.
The 5 cards both of them rent, cheapest published per-GPU on-demand rate each. Dearest first.
| GPU | Massed Compute | Spheron | Difference |
|---|---|---|---|
| NVIDIA B300 SXM6 288GB | $6.60/hr | $10.37/hr | 36% cheaper on Massed Compute |
| NVIDIA RTX PRO 6000 Blackwell 96GB | $2.19/hr | $2.35/hr | 7% cheaper on Massed Compute |
| NVIDIA A100 80GB | $1.35/hr | $1.43/hr | 6% cheaper on Massed Compute |
| NVIDIA L40S 48GB | $0.97/hr | $0.96/hr | 1% cheaper on Spheron |
| NVIDIA RTX 6000 Ada 48GB | $0.79/hr | $0.78/hr | 1% cheaper on Spheron |
Per GPU per hour, on-demand list prices as each provider last published them. Rates exclude tax and vary by region; a cheaper rate is not the same machine, the same network or the same support.
| Massed Compute | Spheron | |
|---|---|---|
| Billing granularityOn short jobs this outweighs the rate: an hour minimum on a 90-second run costs more than a 30% dearer per-second rate. | Per minute | Per minute |
| Minimum commitment | None; prepaid balance with $5 minimum threshold | None on dedicated or spot |
| Payment model | Prepaid balance with automatic recharge | Prepaid credits, USD; enterprise invoicing on request |
| Free credits | Referral credit 3% of referred spend; coupon codes | not stated |
| Egress | Free | Network bandwidth included in the hourly rate |
| Uptime SLA | 99.999% claimed on product page; no SLA document found | 99.9% |
| Regions | US regions (e.g. us-central-3); locations not named | North America, Europe, Asia Pacific |
Neither site tells you whether a commitment auto-renews, how long you have to dispute a bill, whether private networking exists or how much warning you get before maintenance. We looked on both and record the absence rather than filling it in — if you need any of it, ask before you commit.
Massed Compute is cheaper on 3 of the 5 cards both of them rent, by a median of 7%. Spheron is cheaper on the other 2.
NVIDIA B300 SXM6 288GB, NVIDIA RTX PRO 6000 Blackwell 96GB, NVIDIA A100 80GB, NVIDIA L40S 48GB, NVIDIA RTX 6000 Ada 48GB — 5 in total, on published per-GPU on-demand rates.
Of the cards both rent, Massed Compute starts at $0.79 per GPU-hour and Spheron at $0.78.
No. Massed Compute is a GPU specialist — an operator whose whole business is renting these cards. Spheron is a peer marketplace — a stranger whose machine the platform vets to some degree. Reliability, bandwidth and how long the machine stays online vary by host, not just by price. The rates are comparable; what stands behind them is not.