Announcement
Elon Musk announced on 28 June 2026 that the Grok 4.5 artificial intelligence model has entered private beta testing at SpaceX and Tesla. The model is built on a 1.5 trillion‑parameter V9 foundation model and incorporates Cursor data during supplemental training. Musk stated that initial evaluations show the model’s performance approaches, and may even surpass, the performance of the Opus model.
Technical Details
The Grok 4.5 model utilizes reinforcement learning, which Musk said continues to improve the model substantially, and the Grok Build harness is being advanced on a daily basis.
Deployment Plan
SpaceX plans to release completely new AI models that are trained from scratch each month throughout 2026.
Source Note
The article was generated with AI assistance and reviewed by an editor; it carries a Reuters copyright.