Elon Musk has announced that Grok 4.5 has entered internal private testing at SpaceX and Tesla, with performance approaching or surpassing Opus.

According to Dongcha Beating monitoring, Musk announced that based on a 1.5 trillion parameter V9 base model, and further trained on Cursor data, Grok 4.5 is now in internal beta testing at SpaceX and Tesla. Early evaluations show its performance is approaching, and may even surpass Opus. Meanwhile, reinforcement learning (RL) continues to significantly enhance the model, and the Grok Build toolchain is making daily progress. Musk has praised the team's work.

In addition, Musk also revealed that this year SpaceX and related teams will release a brand-new fully trained model from scratch monthly to maintain a high-speed iteration pace.

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