Grok 4.3 Review: What's New in xAI's Latest Model (April 2026)

TechSifted has no affiliate relationship with xAI. xAI didn't send a press release. No blog post, no fanfare. Grok 4.3 Beta just appeared in the model selector on grok.com on April 17 — flagged as "Early Access" — and early testers started posting about it while the broader AI internet was distracted by other things. That's a pattern xAI has leaned into. Quiet drop, let users find it, let Elon tweet about it later. So here's what's actually in this release, what's new, and who actually nee...