archive · today in ai · 2026-06-29

Grok 4.5 enters private beta at SpaceX and Tesla

Archive item — written before sources were shown.

Elon Musk says Grok 4.5 is in private testing at SpaceX and Tesla, built on a 1.5 trillion-parameter V9 foundation, with early performance called Opus-level.

By Rami Steitieh Monday, 29 June · 14:00 UTC Read 1 min · 1 source

Elon Musk announced on June 29 that Grok 4.5 is in private beta testing at SpaceX and Tesla. The model is described as built on a 1.5 trillion-parameter V9 foundation, with early performance metrics characterized as comparable to Opus. No public release date or API access has been announced.

sources

01Elon Musk on Xx.com · primary (announcement)

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Rami Steitieh

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