Here's something worth noting: X's algorithm refresh is actually running on Grok tech, but not what you'd expect. It's not tapping into Grok-4, Grok-3, or even Grok-2—instead it's leveraging a more stripped-down variant that xAI open-sourced back in 2021. Think of it as the foundational transformer model rather than the latest and greatest. Interesting choice that raises questions about stability versus cutting-edge performance in production systems.