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Grok 4.5 Enters Private Beta Testing at SpaceX and Tesla
The model, built on the 1.5T V9 foundation model with added Cursor data, is undergoing internal evaluation at the two companies. SpaceX plans monthly releases of new models trained from scratch.
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Grok 4.5 has entered private beta testing at SpaceX and Tesla. The model was built on the 1.5T V9 foundation model, with Cursor data incorporated during supplemental training. Early evaluations show performance close to or perhaps exceeding Opus.
Reinforcement learning continues to improve results, and the Grok Build harness advances daily. SpaceX will release completely new models trained from scratch every month for the rest of the year.
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