xAI Ships Grok 4.3 Beta for $300/Month SuperGrok Heavy Tier
What Happened
xAI released Grok 4.3 Beta on April 17, exclusively for SuperGrok Heavy subscribers at $300/month. The release builds on Grok 4.20, which holds an 83% non-hallucination rate on the Omniscience benchmark — the highest of any frontier model tested — and offers a 2-million-token context window. xAI continues to position Grok around factuality and real-time X data integration.
My Take
Hallucination is the enterprise-AI boogeyman no lab has decisively solved, and xAI has quietly made it the marketing wedge. If Grok is genuinely 10+ points more factual than Claude, GPT, and Gemini, that's legally and commercially meaningful — a law firm or regulated insurer can defend using it where they couldn't defend a generic frontier model. The $300 tag signals xAI is done competing on price and is chasing the high-margin regulated enterprise segment. Smart repositioning, if the factuality claims hold under audit.
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