Dan
@KettlebellDan · Jun 28, 2026
maximum truth-seeking or bust
Elon Musk@elonmusk· Jun 28, 2026Grok 4.5, based on our 1.5T V9 foundation model, with Cursor data added in supplemental training, is now in private beta at SpaceX & Tesla. Early evals show performance close to, perhaps exceeding Opus.
RL is continuing to significantly improve the model, and the Grok Build
Elon Musk
@elonmusk
Yes
11:21 PM · June 28, 2026 · 92K views
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