H100 vs MI300X: Cloud Pricing & Availability (2026)

When to pick which

• Pick the H100 to minimise hourly cost — its on-demand floor ($1.29/hr) is the lower of the two right now.
• Pick the MI300X for larger models or bigger batch sizes — its 1536 GB of VRAM fits more without sharding across GPUs.
• The H100 is listed by more providers (21), so it's usually easier to find in stock.
• Over the last 7 days the H100 held ≥80% availability at a larger share of providers — the steadier pick if you need capacity on demand.

FAQ

Is the H100 or MI300X cheaper to rent in the cloud?

Across the providers GPU Finder tracks, the H100 starts at $1.29/hr and the MI300X at $1.99/hr on demand. The H100 is currently cheaper, with an on-demand floor of $1.29/hr — about 35% below the MI300X. Prices update hourly, so check the live tables before you commit.

Which has more cloud providers, the H100 or MI300X?

The H100 is offered by 21 providers and the MI300X by 2 providers in our catalog. More providers usually means more regions and an easier time finding capacity in stock.

How much GPU memory do the H100 and MI300X have?

The H100 carries 80 GB of VRAM and the MI300X 1536 GB. VRAM is the main constraint on the model size and batch size you can run on a single GPU.

Which is more reliably available, the H100 or MI300X?

Over the last 7 days, 8/12 held ≥80% of scored providers kept the H100 in stock, versus 0/2 held ≥80% for the MI300X. GPU Finder polls provider stock hourly and scores reliability from that history.