What went up, and by how much
AWS raised prices on EC2 Capacity Blocks for ML by about 15 percent starting Saturday, January 3, 2026. An eight-GPU p5e.48xlarge instance, built around Nvidia H200 accelerators, went from $34.61 to $39.80 an hour in most regions. The p5en.48xlarge variant went from $36.18 to $41.61 an hour. In US West (N. California), where compute has historically run at a premium, the p5e rate rose from $43.26 to $49.75 an hour. [1]
An AWS spokesperson's explanation, quoted in the article, was short: Capacity Block pricing "vary based on supply and demand patterns, as described on the product detail page," and this adjustment reflected "the supply/demand patterns we expect this quarter." AWS did not name a specific cause, such as a customer commitment or a shortage of a particular chip. [1]
A Capacity Block is a reservation, not a spot price
A Capacity Block is a reservation for a fixed-size cluster of accelerated instances at a future start date, bookable up to eight weeks ahead for terms from a day to several months. It exists so a customer can lock in guaranteed GPU capacity for a training run without negotiating a long-term contract. AWS prices Capacity Blocks dynamically, separately from its on-demand and Savings Plan rates for the same instance types. [2]
Atlas interpretation: That separate pricing track is why this increase does not contradict AWS's on-demand and Savings Plan price cuts of roughly 45 percent announced about seven months earlier. The two are different products sold against the same hardware: one is a discount for commitment, the other is a market-clearing price for guaranteed near-term availability. A Capacity Block getting more expensive while list prices for the same GPU fall is a sign of a tight near-term reservation market sitting on top of an otherwise well-supplied one, not a reversal of the earlier cut. [1]
Sources
- AWS raises GPU prices 15% on a Saturday, hopes you weren't paying attention
The Register · Jan 5, 2026
- Amazon EC2 Capacity Blocks for ML
Amazon Web Services · Sep 8, 2026