NVIDIA B300 reaches the open rental market: first measured spot prices
The NVIDIA B300 — the Blackwell Ultra part — is now rentable on the open spot market, and TKX measures it directly. As of July 17, 2026, the TKX-GI international leg prints B300 at $6.94/hr (288 GB configuration). No press release, no broker quote: a price read programmatically from a public rental marketplace, refreshed with every collector run.
The eight-card ladder, measured
TKX-GI's international leg now covers eight data-center and prosumer cards. The prints below are from July 17, 2026 (median-style spot rates; sources: Vast.ai public API, RunPod public GraphQL — the lower of secure/community tiers):
| GPU | Spot rent · USD/hr | Source |
|---|---|---|
| B300 (288 GB) | $6.94 | runpod |
| B200 | $7.44 | vast |
| H200 | $3.87 | vast |
| H100 NVL | $2.62 | vast |
| H100 SXM | $2.27 | vast |
| A100 SXM4 | $1.00 | vast |
| RTX 5090 | $0.43 | vast |
| RTX 4090 | $0.38 | vast |
A domestic (China) leg tracks the same market from the other side — e.g. RTX 4090 at ¥2.18/hr — so the index has a token leg and two GPU legs. Live values and daily history: /api/v1/indices.json.
What the early prints say
- A B300 print below B200 is a supply artifact, not a verdict. The B300 series has just started accumulating (small early sample from one marketplace); B200's print reflects a deeper, older book. Treat cross-card comparisons as indicative until the B300 history thickens — the daily series is published, so you can watch it converge.
- Depreciation is brutal and visible. The H100 SXM — the definitive AI workhorse two years ago — now rents at $2.27/hr on the spot market. This is exactly why a measured, continuous price series matters: list prices never show you this curve.
- The ladder is continuous. From a $0.38 RTX 4090 to a $7.44 B200, the rental market prices compute in a smooth curve — evidence of a genuinely liquid, commoditizing market.
What a rental price is not
Methodology notes
- RunPod prices fill only cards Vast lacks (currently B300); when both list a card, Vast remains the primary source — one card, one source, no blending across marketplaces.
- Where a marketplace has secure and community tiers, TKX records the lower — the true marginal price of getting the work done.
- Every value carries provenance: source, timestamp and payload hash at /data/provenance.json.