Elon Musk has announced on the X platform that the latest artificial intelligence model from his company xAI, Grok 4.5, has entered a private testing phase. It is currently being trialed internally at SpaceX (SPCX.US) and Tesla Motors (TSLA.US). This indicates the model is being validated within Musk's own ecosystem of advanced manufacturing firms before a potential public release.
According to Musk, Grok 4.5 is built on a V9 foundational model with 1.5 trillion parameters and has been supplemented with training data from the AI coding platform Cursor, highlighting its enhanced capabilities in code generation and software development assistance. Internal testing typically involves providing limited access to a specific user group before a formal launch, allowing the development team to identify issues, gather feedback, and refine the product.
This testing update underscores the intensifying competition among leading AI companies, as they race to improve model performance and expand application boundaries. Musk has previously committed to releasing new AI models every month this year, signaling an aggressive development cycle for xAI that is likely to intensify its rivalry with competitors like OpenAI, Anthropic, and Google.
While Musk has not disclosed further technical details about Grok 4.5's specific capabilities, the incorporation of Cursor training data points to a continued focus on strengthening its position in software development and code assistance—one of the most critical commercialization avenues for large language models.
Musk also revealed that SpaceX plans to release new AI models that are "completely trained from scratch" on a monthly basis for the rest of the year. This statement suggests that future versions may not merely be incremental upgrades but could be fundamentally new models built from the ground up, potentially representing more significant technological leaps.
This testing push comes as xAI continues to expand its AI infrastructure, aiming to position Grok as a strong contender in the rapidly evolving generative AI market. Testing the model first within SpaceX and Tesla provides an opportunity to integrate it with real-world, large-scale engineering, manufacturing, and software development scenarios before a wider deployment, allowing for practical feedback. Musk has not provided a timeline for the public release of Grok 4.5.
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