Elon Musk starts Grok 4.5 private beta at SpaceX, Tesla
Technology
Elon Musk just kicked off private beta testing for Grok 4.5, xAI's newest AI model, at SpaceX and Tesla.
Built on a massive V9-Medium architecture with 1.5 trillion parameters, Grok 4.5 is aiming to match, or even beat, top rivals like Anthropic's Opus model.
Cursor boosts Grok 4.5 coding
Grok 4.5 gets smarter at coding thanks to Cursor, an AI coding assistant SpaceX announced a deal to buy in June 2026.
By learning from real-world code edits and daily updates to its "Grok Build" system, the model keeps improving fast.
Musk says this is all part of xAI's bigger push into enterprise AI tools, and yes, more fresh models are planned every month through the end of the year.