Grok 4.3 is the public name of xAI’s 0.5-trillion-parameter V8 foundation model, following Grok 4.20 in the corpus. It is the shipped model that Elon Musk reported improving every few days while a 1.5-trillion-parameter V9 finished training behind it, the first released model the recursive-self-improvement cluster records as actually being updated on a cadence of days, making good on Musk’s February promise that Grok 4.2 would improve every week.
AISystem
Grok 4.3
xAI's half-trillion-parameter Grok release, the public version of its V8 foundation model, which Musk said was being improved every few days after it shipped.
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- Welcome to May 17, 2026 (theinnermostloop.substack.com)
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