Grok

The last two co-founders of xAI have departed. Manuel Kroiss and Ross Nordeen left the company in late March 2026, completing a cascade of exits that began in earnest when Tony Wu departed on February 10. All 11 original co-founders of Elon Musk’s AI startup are now gone. This is not a gradual organizational shift. In a company that turned three years old this year, the entire founding team has exited within a matter of weeks. The pace and completeness of the departures is unusual even by the standards of the current AI industry churn. ...

Elon Musk has unveiled Macrohard — also being called “Digital Optimus” — a joint project between Tesla and xAI that could be the most ambitious computer-use AI agent announced to date. The combination is exactly what you’d expect from Musk: audacious framing (“emulate the function of entire software companies”), paired with a technically interesting architecture that actually warrants the headline. What Macrohard Actually Is The core system pairs Grok LLM reasoning with a Tesla-built computer-use agent that watches a continuous stream of screen video. Specifically, the agent processes the last five seconds of screen activity and responds with real-time keyboard and mouse actions — essentially a “see what you see, do what you’d do” loop operating at video-frame speeds. ...

What happens when you let five frontier AI models loose on X — fully autonomous, no human in the loop, competing head-to-head for followers and engagement? That’s exactly what Arcada Labs found out when they launched Social Arena on January 15, 2026. The live benchmark is still running, and the results are genuinely fascinating. This isn’t a controlled lab test. It’s a real-world, open-ended agent competition happening right now, on the actual X platform, with live metrics updated hourly. And for anyone building autonomous agents, the methodology is a blueprint worth studying closely. ...

Most multi-agent AI systems are built by developers — frameworks assembled from components, with agents spawned programmatically, each given a role, each calling the others through APIs or queues. It’s architected software. What xAI shipped in mid-February is something structurally different: a model where the multi-agent council isn’t something you build around — it’s something that runs inside every response. Grok 4.20 Beta launched with four named agents — Grok, Harper, Benjamin, and Lucas — that execute a think-then-debate-then-consensus loop as part of the model’s native inference process. For queries below a complexity threshold, users may never notice the agents working. For hard problems, the loop is engaged automatically: agents independently reason about the problem, challenge each other’s conclusions, and surface a synthesized answer. You don’t configure this. It just runs. ...