xAI’s latest model isn’t going to the public. It’s going to work.
Grok 4.5, announced on June 28 via Elon Musk’s X account, has entered a private beta testing phase exclusively with teams at SpaceX and Tesla. The model is built on xAI’s new V9 foundation, which packs 1.5 trillion parameters, making it roughly three times larger than the V8-small architecture that powered earlier Grok 4 variants.
What’s under the hood
xAI supplemented its training pipeline with Cursor data, a move specifically designed to sharpen coding and technical competencies. Cursor is a popular AI-powered code editor.
Early internal evaluations suggest Grok 4.5’s performance is comparable to, if not superior to, Anthropic’s Claude Opus.
