On Sunday (28th) local time, Musk posted on his social media platform X that his latest generation large language model Grok 4.5 has officially started beta testing within SpaceX and Tesla before wider promotion.
It is worth noting thatAccording to Musk, early evaluation results show that the model's performance is close to, and may even exceed, Anthropic's flagship model Claude Opus.Currently, reinforcement learning (RL) continues to significantly optimize the model, and its supporting "Grok Build" test benchmark is also improving day by day.
The billionaire entrepreneur also said,SpaceX plans to release a new artificial intelligence model "trained entirely from scratch" every month for the rest of this year.The remarks hint that future versions may not be simple improvements to existing systems, but new base models built with new training.
The update highlights the increasing pace of development among leading AI companies as they race to improve model performance and expand functionality. Musk’s promise to release new artificial intelligence models every month this year shows that xAI is pursuing an active research and development cycle, which may intensify competition with competitors such as OpenAI, Anthropic and Google.
Pay attention to software development
According to Musk, Grok 4.5 is based on the V9 basic model with 1.5 trillion parameters, and data from the popular AI programming tool Cursor has been specially added to the supplementary training.
Beta testing is a limited trial that provides a new software product to a subset of users before it is officially released so that developers can find bugs, collect feedback, and make improvements.
Although Musk did not provide detailed technical information about Grok 4.5's capabilities,The addition of Cursor training data demonstrates Grok's continued emphasis on software development and coding assistance, one of the most important commercial applications of large language models.
On the 16th of this month, SpaceX announced that it would acquire AI programming company Anysphere, the developer of the popular AI programming assistant Cursor, for US$60 billion. The move is aimed at accelerating its layout in the enterprise-level artificial intelligence market.
SpaceX said at the time that it expected the merger to close in the third quarter of 2026. The company has been paying attention to Cursor for several months. In March this year, two Cursor product engineering leaders joined SpaceX to participate in its moon-related projects and xAI research and development.
The announcement comes as xAI continues to expand its artificial intelligence infrastructure and position Grok as a strong competitor in the rapidly growing generative artificial intelligence market. Testing the model internally at SpaceX and Tesla will hopefully gain experience using large-scale engineering, manufacturing and software development workflows before wider deployment.