xAI burned $6.4B last year — SpaceX’s IPO filing shows why the spending is far from over | TechCrunch
… Per the filing, SpaceX recorded 117 million monthly active users MAUs for Grok AI features as of March 2026, out of 550 million total MAUs across Grok and X combined. That implies only one-fifth of the combined ecosystem is actively using Grok AI features. …