# SpaceX vs. Nvidia: Best AI Stock

> Nvidia's AI dominance beats SpaceX's growth risks for investors.
- Title: SpaceX vs. Nvidia: Best AI Stock · The Motley Fool | Shortify
- Summary: Nvidia's AI dominance beats SpaceX's growth risks for investors. Nvidia's $5.19T market cap and 10x inference cost reduction make it the better AI stock than…
- Keywords: nvidia, spacex, market cap, vera rubin architecture, grok ai, finance, money, Best, Stock, The Motley Fool
- Source: The Motley Fool — https://fool.com/investing/2026/10/16/better-ai-stock-spacex-vs-nvidia
- Author: Keithen Drury
- Published: 2026-10-16T10:30:00+00:00
- Read time: 1 min
- Topics: nvidia, spacex, ai, market cap, vera rubin architecture, grok ai, finance, money
## Nvidia and SpaceX: AI Powerhouses
Nvidia valued at $5.19T and SpaceX at $1.95T are both massive AI investments.
## Nvidia's AI Hardware Edge
Nvidia's GPUs power AI workloads with a 10-fold inference cost reduction versus prior Blackwell GPUs.
## Elon Musk's Nvidia Partnership
Elon Musk confirmed SpaceX will use Nvidia's Vera Rubin architecture exclusively for AI.

> And going forward, we've decided to build exclusively on Nvidia because we think the Vera Rubin architecture is the best architecture. We think it's the best AI computer, and we greatly value our close cooperation and partnership on many levels with Nvidia. So, we're exclusive to Nvidia.
## SpaceX's Grok AI Growth
SpaceX's xAI generated 213% revenue growth in Q2 with Grok AI models.
## Nvidia's Revenue Advantage
Nvidia's $412B revenue dwarfs SpaceX's $45B revenue, making it the stronger AI player.
## Valuation Gap
Nvidia trades at 2.5x SpaceX's revenue, making it significantly cheaper despite higher growth.
## Key takeaway

Nvidia's $5.19T market cap and 10x inference cost reduction make it the better AI stock than SpaceX's $1.95T market cap.