Elon Musk
@elonmusk
Grok 4.20 Heavy (Beta 2) is extremely fast for deep analysis.
Beta 3 will have many fixes and functionality gains.
Artificial Analysis@ArtificialAnlys· Mar 12, 2026The Grok 4.20 Beta shows three major improvements over Grok 4:
➤ Our lowest ever hallucination rate on the AA-Omniscience evaluation. When Grok did not know the answer, it hallucinated an incorrect answer 22% of the time - this is the lowest hallucination rate of any model we
09:04 PM · March 12, 2026 · 5.4M views
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